Good Gear Guide
In pictures: New features in iPhone Software Updat...
Use multiple iTunes accounts
Other changes to the App Store include the ability to sign out of your iTunes account in order to use another one. There have been rumours that Apple would no longer allow you to download multiple copies of an iPhone app without having to pay again. This would prevent people from sharing iPhone apps without paying for them but it seems this measure hasn't been introduced yet.
The way the App Store displays app photos has also changed. You no longer have to click on each individual photo to view them at full size, but rather the photos appear as a sliding thumbnail gallery. Many people have issues when loading these photos, so we hope that this will prevent such problems.
In pictures: New features in iPhone Software Update 3.0