Yeah, flash would be good so you can browse pretty much ALL of youtube.
I have a theory, we all know that bottom row on the phone has room for 4 more icons, and I'm wondering if Apple plans on developing different programs and then letting you choose which ones you want on your phone. You know how we were talking about having a Ringtones tab in iTunes, maybe we'll have a programs tab where we can add and remove more programs, kind of like you can add and remove Widgets and stuff on a Mac. That would be pretty cool. Be able to choose between games, chat clients, etc...wishful thinking probably, but that would be pretty cool, even if you have to buy them on itunes. (Except for iChat and stuff like that, because that should have come standard, so if they charge for taht, that's kinda mean, haha)