Battery life is touted at 5 hours (for using iPod/Video?/calltime etc). I'm also hoping that the memory can be increased, there is a memory stick slot on the bottom of the phone but i'm not sure if that is for expansion or the one in use. Either way, i hope it can be increased. Also having concerns about the network provider but i guess it will all get worked out.
I'm presuming that you can use Cocoa for development on it for those little apps too!
The iPhone is set to go on sale in the US in June, and be available in Europe from Q4.
As for the AppleTV, its a wireless Media Centre that can pull your media from iTunes so you can watch it on your TV. You can buy movies and watch trailers and stuff on iTunes too. One cool features is its ability to share media from other peoples computers, so you can watch videos or photos on your TV that a friend has on their laptop. I think we'll have to get one, along with a nice Mac Mini for the living room
Thanks,
Sarah