iPhone OS 3.0
How can I fix my lost or mixed up icons in iPhone OS 3.0?
iPhone users have noticed application icons disappearing, or the wrong icon showing above an app name after upgrading to firmware 3.0. Maybe Apple will fix the confused icon bug in iPhone OS 3.1, however the company has been mum on the issue for months.

Turns out in the meantime you can try the following fix. Truphone contacted its users via email with the following instructions to try:
iPhone MMS on AT&T: Not Until September
Update: Apple iPhone 3G and 3GS will support MMS. AT&T will begin support of MMS on their network starting on September 25, 2009.
iPhones across the world have had MMS (Multimedia Messaging Service) capability since the iPhone 3GS was released on June 19. Apple declared that AT&T would make MMS available to its customers in "late summer" of this year.

Well it's getting close to crunch time for AT&T. Last time we checked, the second half of August can be referred to as "late summer" here in the Northern Hemisphere. There's been no MMS news except for disgruntled iPhone owners complaining.
Fix Camera Roll Problems in iPhone OS 3.0
Users are reporting a bug in iPhone firmware 3.0 that prevents photos from appearing on the camera roll. Although image files are present on the device and can be copied with iPhoto, thumbnails are hidden on the camera roll.
The camera roll even counts the correct number of photos as it hides a portion of the files. Users have determined the problem arises when numbers in photo filenames exceed 10,000. For some reason the iPhone OS 3.0 camera roll does not display these files.
How To Email Full Resolution Photos From Your iPhone
Did you know that when you email a photo from the camera roll on your iPhone, the resolution of the picture is automatically degraded to 800x600? This makes sense if you don't need to send anything at a higher quality resolution.

But what if you need to send the full resolution photo? The original iPhone and iPhone 3G both take photos at 1600x1200 resolution. The iPhone 3GS with its auto-focus camera takes photos at 2048x1536 resolution.
How to Activate Tethering on iPhone OS 3.0
AT&T does not currently allow tethering on the iPhone even though Apple's iPhone OS 3.0 includes the feature. The company is still deciding what a tethering data plan for iPhone would cost and how it would be structured.
Tired of waiting? If you have an iPhone 3G or 3GS running OS 3.0 and a computer running iTunes 8.2 on Mac OS X here's how to activate tethering. You will be able to connect your computer to the AT&T data network using USB or Bluetooth via your iPhone.
Tip: Show iPhone Battery Percentage Remaining
The little battery icon in the taskbar at the upper right of the iPhone screen is okay at giving a rough indication of battery life remaining. Unfortunately when it comes to details the icon is not so useful.
Luckily there are ways to display the exact percentage of power remaining on your iPhone battery. There are two different methods you can use to achieve this goal depending on your iPhone hardware.
iPhone Dev-Team Delays 3GS Jailbreak Release
iPhone 3GS owners who would like to jailbreak and/or unlock their new devices will have to wait a little bit longer. The iPhone Dev-Team has already jailbroken the iPhone 3GS running OS 3.0 but they are postponing the public release.
The cat and mouse game is never simple. Dev-Team is worried that releasing a jailbreak now will give Apple too much information. The iPhone OS 3.0.1 release is surely coming soon, and if Apple corrects the bug Dev-Team is exploiting then future iPhone 3GS users will not be able to hack their phones.
Dev-Team Releases Jailbreak for iPhone OS 3.0
They've done it again. The iPhone Dev-Team has announced a brand new version of PwnageTool for jailbreaking iPhone OS 3.0. The team is hard at work as usual, developing jailbreak and unlock software for all of Apple's latest mobile hardware and software.
The new PwnageTool will not work on the iPhone 3G S (or the new iPod Touch) as of this writing, however more software is on the way. So far, iPhone Dev-Team has only released the Mac OS X version of PwnageTool, although they promise that a Mac OS X and Windows version of QuickPwn is coming soon.
iPhone 3G S Features Not Revealed at WWDC
But wait, there's more! There are still some details about the iPhone 3G S that were not announced at the WWDC keynote speech. In fact, we're betting that even more information will be revealed when the new model actually hits the streets on June 19th.

Apple did not mention the specifications of new hardware in the iPhone 3G S on Monday. Turns out a T-Mobile site in the Netherlands has verified that the RAM has been doubled to 256 MB.
New Features in iPhone OS 3.0 - Coming June 17th
During the keynote address at WWDC 2009 the head of Apple's iPhone software development, Scott Forstall, revealed major new features coming to iPhone OS 3.0.

The new iPhone OS will be released worldwide on June 17th. The cost to upgrade firmware will be $9.95 for iPod Touch and free for iPhone.