Ok... 3.0 is probably not going to bring anything awesome to the table but it will satisfy those long lost things that were omitted from the iPhone.
->MMS(why not, its all in the software)
->Background Apps(why not, its all in the software- however you may need an update to the phone to run it really really smoothly. There will probably be a limit to the number of background apps you can run)
->Copy/Paste(why not, its all in the software, its not like they have to build a special button for it.)
->Video(I'm not sure if this requires a hardware upgrade)
These would be the most obvious additions to the iPhone.
and they will advertise it like:
And now. You can copy. And paste.
or
Capture your life, with video.