Apple and AT&T have been making preparations for the launch of iPhone firmware 3.0. Here is a list of the changes and preparations that have been noted:

• The new MobileMe Find My iPhone feature has been live this past week.
• Push Notification support is beginning to appear in the App Store. Tap Tap Revenge [App Store] specifically has been updated to provide push notifications.
• The iPhone 3G S Firmware 3.0 has already appeared on Apple’s servers. This firmware is specifically for the new iPhone 3G S (iPhone2,1) so is not recommended to be installed on older iPhones.
• AT&T has posted a FAQ (PDF) about the iPhone 3G S and comments on MMS and tethering:

Later this summer, as part of the 3.0 software, AT&T will make multimedia messaging (MMS) available at no extra cost to customers with a text messaging bundle. And, in the future, AT&T will offer tethering capability for iPhone 3G S and iPhone 3G.

• The iPhone 3.0 re-download charing message has been removed and was a bug according to AppAdvice. Re-downloading apps in 3.0 should be the same as the current firmware ( which means free).

In addition, there have been a couple of YouTube videos have appeared walking through the features of the new iPhone 3.0 operating system. Video 1 , Video 2

The firmware will be officially released June 17th