OK, many of these have probably been asked and answered around the place, but searching didn't turn up much, and a little summarising wouldn't hurt anyway. If anyone has any other questions, add away 
Bluetooth - I believe the stack, or something like that, limited the BT capabilities of the 'current iPhone', has this changed? Could BT file exchange be possible with an App?
Would we need to see the new hardware before this can be answered?
Finder - As far as I know there's no such thing as a File Manager in the current or 2.0 firmware, but that kinda limits the scope of 3rd party Apps, doesn't it? No where to save files or move them between Apps. (How could I write a rich text document then email it, for example?)
MMS - Does the SDK T&C allow what ever is required to allow the iPhone to send and receive MMS? I'd assume it would have to intercept the message before the SMS app tried to handle it and says no, right?
Copy & Paste - This wouldn't be possible to add with under the SDK T&C, right?
Purchased Apps, restored iPhone - I buy lots of lovely Apps, then my iPhone goes kerplunk, I restore it, all is well. But do I need to buy my Apps again, or can I just re-download them for free, or what?
Push me.com email on an unlocked iPhone - I'm currently using my iPhone unlocked on a non-Apple-chosen network, would the push email work in this situation, or would their servers know and decline it?
Tea - Will the new iPhone be able to make me cups of tea or demand?
Bluetooth - I believe the stack, or something like that, limited the BT capabilities of the 'current iPhone', has this changed? Could BT file exchange be possible with an App?
Would we need to see the new hardware before this can be answered?
Finder - As far as I know there's no such thing as a File Manager in the current or 2.0 firmware, but that kinda limits the scope of 3rd party Apps, doesn't it? No where to save files or move them between Apps. (How could I write a rich text document then email it, for example?)
MMS - Does the SDK T&C allow what ever is required to allow the iPhone to send and receive MMS? I'd assume it would have to intercept the message before the SMS app tried to handle it and says no, right?
Copy & Paste - This wouldn't be possible to add with under the SDK T&C, right?
Purchased Apps, restored iPhone - I buy lots of lovely Apps, then my iPhone goes kerplunk, I restore it, all is well. But do I need to buy my Apps again, or can I just re-download them for free, or what?
Push me.com email on an unlocked iPhone - I'm currently using my iPhone unlocked on a non-Apple-chosen network, would the push email work in this situation, or would their servers know and decline it?
Tea - Will the new iPhone be able to make me cups of tea or demand?