Cydia
How can I fix Cydia error: Wow, you exceeded the number of package names this APT is capable of?
Sometimes Cydia on jailbroken iOS devices will run out of space in its data structure to host packages. The default repositories already contain approximately 40,000 packages, which leaves space for an extra 25,000 or so from repository sources added by the user. If this number is exceeded, you might see several errors including:
Wow, you exceeded the number of package names this APT is capable of.
Problem with MergeList
The package lists or status files could not be parsed or opened.
To fix this problem, follow these steps:
1. Open Cydia
2. Navigate to Manage -> Sources -> Edit
Chpwn Releases Gridlock 2.0 With iOS 6 Support
I finally upgraded from iOS 5.0.1 to iOS 6.1.2 and jailbroke my device using evasi0n. While I'm happy about being all caught up and ready for the iOS 6.1.3 patch, I was also disappointed to learn Apple changed how icon movement works. This means tweaks such as AlwaysArrange have been rendered useless on iOS 6. However, themers will be hapy to know jailbreak developer chpwn has updated the very popular jailbreak tweak Gridlock with iOS 6 support.

Gridlock 2.0 allows you to place your app icons anywhere on your Home screen without other apps replacing them. This gives you the ability to create different patterns, or to show off your wallpaper by moving apps out of the way. Gridlock 2.0 is much better than using blank icons or hiding apps with other jailbreak tweaks.
How to Replace Siri with Google Search [Jailbreak]
Google Search is getting rave reviews, and side-by-side comparisons have shown Google's voice assistant is much faster and sometimes more accurate than Apple's Siri. Jalbreakers who would like to kick Siri to the curb can do so by downloading the NowNow jailbreak utility from the BigBoss repo in Cydia. NowNow allows you to replace Siri by launching the Google Search app with an Activator function. To do so, just download the utility, locate the NowNow option under Settings and tap Activation Methods. You can then select the function you would like to use to activate the Google Search app. To replace Siri select "Short Hold" under the Home Button options. Holding the Home Button will now bring up the Google Search app instead of the Siri screen.

iPhone Dev-Team Releases Redsn0w Update [Version 0.9.15b1]
The iPhone Dev-Team has released redsn0w version 0.9.15b1. The update brings a lot of changes for restoring to older firmware. It also now includes Cydia for the tethered iOS 6 jailbreak on A4 devices. iPhone 3GS and iPhone 4 owners can learn how to jailbreak their devices running iOS 6 by clicking here.

The changelog has a lot of information. The Dev-Team suggests visiting the comments section on their blog if you're confused or have any questions. This is also where you can get the download links for redsnn0w v.0.9.15b1.
"We realize there’s a lot of info in this post. If you’re at all confused about things remember to visit our comments section, with our very helpful user base and moderators like dhlizard, Frank55, 41willys, and slavakulikoff."
Absinthe Co-Creator Not Working on iOS 6 Jailbreak
Absinthe co-creator pod2g dropped some disappointing news on the jailbreaking community on Tuesday. The iOS hacker announced he's not working on a jailbreak for iOS 6. Pod2g is mostly responsible for the last untethered jailbreak most jailbreakers are currently using today.

Pod2g's announcement doesn't mean a new jailbreak is not in the works. Another iOS hacker known as Chpwn, tweeted an image of a jailbroken iPhone 5 with Cydia installed over the weekend. This is a good sign that a public iOS 6 jailbreak could be available in a few months.
First Picture of a Jailbroken iPhone 5 Running Cydia
The well known jailbreak developer Chpwn (aka Grant Paul) tweeted a screenshot of Cydia running on an iPhone 5 the same day the device was released. While this is exciting news, it does not mean an untethered iOS 6 jailbreak is right around the corner. It took the jailbreaking community a couple of months to publicly release Absinthe 2.0, even though three different jailbreaks were reported to be working on the new iPad before its release.

This hopefully means the jailbreaking community is also on the road to jailbreakng other iDevices running iOS 6.
Make Google Chrome and Third Party iOS Apps Faster by Giving them a Nitrous Boost
If you prefer Google Chrome (or any other browser) over Safari but use Safari because it's faster, I have the perfect jailbreak tweak for you. iPhone users can now give Chrome and other third party apps a speed boost with a new jailbreak tweak called Nitrous.

Safari is faster than other mobile browsers on the iPhone because Apple restricts access to the fast Nitro Javascript engine in iOS. Nitrous levels the playing field by unlocking the Javascript block for third party apps. This allows browsers like Chrome and apps like Tweetbot to perform much better.
SearchEnable: Add Alternative Search Engines to Safari
SearchEnable is a new jailbreak tweak that allows you to add alternative search engines to Safari. The tweak adds Ask, Baidu, blekko, Sogu, Volunia, Yandex, Evi and WolframAplha to the Safari search engine options listed under Settings. SearchEnable basically gives you a few more international choices besides the popular U.S. options (Google, Yahoo and Bing) already included on your phone. Make sure you have the Safari app enabled under SBSettings or the Safari setting panel will not be available.

New Jailbreak Tweaks: BannerDisable and FacebookThis
Two new and interesting jailbreak tweaks popped up in Cydia today. BannerDisable adds a “Do Not Disturb” toggle switch to your iPhone. The switch allows you to quickly disable notifications for all apps with one button. Once installed, the “Do Not Disturb” toggle will appear beneath the Airplane Mode option under Settings for quick access. There is also another tweak called DoNotDisturb which adds the same kind of switch to your Notification Center.

The second tweak called FacebookThis allows users to upload photos to Facebook directly from their Camera Roll. Apple is expected to announce full Facebook integration with iOS 6 next week at the WWDC conference. This tweak allows jailbreakers who will not be upgrading to experience some Facebook integration, but not the full Facebook integration non-jailbreakers will be enjoying in the future.
MobileTerminal Now Available in Cydia
Yay! No more annoying process to add MobileTerminal to your iPhone. An iOS 5-compatible version of the popular terminal tool has been added to Cydia. MobileTerminal is an iPhone version of the Mac OS Terminal utility that allows you to change your root password, or SSH your device. Installing MobileTerminal to your iPhone originally required a long process, but now it is one easy tap away.
MobileTerminal makes it possible to run utilities such as OpenSSH right from your iPhone, and it allows you to run system administration tasks from anywhere. It's a great and necessary tool for jailbroken iPhones.