Must be sad to be an old iPhone, or an original iPhone user for that matter. After almost three years in circulation, the aluminum-backed iPhone is officially obsolete. Apple's iPhone 4 upgrade will not run on the earliest iPhone hardware at all.

Apple CEO Steve Jobs confirmed that the company would cease support for the original iPhone in an email this week. When asked if the device would see any future updates he simply replied, "Sorry, no."

One surprise in the iPhone 4 keynote speech was a move away from the typical black home screen wallpaper background. Unless they've jailbroken their iPhone, users are painfully aware that only the lock screen can be customized. The custom home screen background featured in the iPhone 4 keynote speech is featured below.

With the release of iPhone 4.0 firmware this summer, Apple has finally added support for custom home screen wallpaper, along with a new look for the dock.

Steve Jobs revealed some stunning numbers today at the Apple iPhone 4 event. There have been 50 million iPhones sold, and an additional 35 million iPod Touch units. In addition to all of these devices running iPhone OS, iPad sales topped 450k units so far this week.

In six days, iPad users have downloaded 3.5 million iPad applications and 600k iBooks. Total downloads for the App Store to date is a whopping 4 billion downloads. There are 185,000 apps available, including 3,500 iPad only apps so far. With all of these mobile devices running Safari, Apple's share of mobile browser usage dominates at 64 percent. In second place comes the Android browsers with 19 percent, and BlackBerry takes third with a 9 percent total share.

Getting an iPad on April 3rd? Well even if you haven't pre-ordered, free accessories are always welcome. The iPad Guide has just announced their April Accessory-A-Day Giveaway. With the ship date for Apple's iPad only hours away, cases, screen protectors, and insurance are sure to be in demand. The iPad Guide is offering a free product every weekday this month for contest entrants.

The contest features several iPad accessories including body skins, screen protectors, iPad insurance, iPad warranties, stands and cases. Featured products come from popular companies including M-Edge, Hard Candy, Griffin Technologies, ZAGG, Gelaskins, SquareTrade, and Worth Ave Group.

Sources familiar with pre-release builds of iPhone OS 4.0 claim the operating system will lift restrictions on the multitasking of apps. AppleInsider reports that an interface modeled after the Mac OS X Expose feature would show icons of all running apps and allow the user to switch between them.

In the desktop version of Expose, windows of running applications are reduced in size and aligned so they can all be seen simultaneously. Currently, only a list of native iPhone apps is permitted to run in the background, although iPhone OS is fully capable of multitasking. These apps include the iPod, SMS, Phone, Mail, and Voice Recorder among others.