The new iPhone 3.0

The new iPhone 3.0 will have
Copy and paste
Everyone is waiting for cpy and paste on the iPhone. And finally there will be copy and paste on the iPhone.

Push notification
Since iPhone released, a lot of people were asking:"Where is my push notification?"
And it will be available to upgrade to have push notification in summer.

Landscape keyboard
When a lot of developers are developing landscape typing mode in mail and other apps, you will be able to use mail in landscape mode without third party apps.

Spotlight search on the home screen
So now when you can't find your files, you can find it.

MMS message support
You can finally get MMS messages on the iPhone. Is it only on the iPhone 3G?

Bluetooth
You can get your iPod touch's bluetooth working without jail breaking it!

Voice Memos
You'll be able to record voice on an iPhone and iPod touch.

App Store
The app store will be in 77 countries around the world.

In app purchasing
Now you don't need to purchase a whole app in the app store when you need to buy an upper level, you can just purchase the level in the game(or other apps).

more info : about iphone os 3.0
Inform me if I am wrong.