1) Hero is definitely strong enough. Hell, the MyTouch3G is strong enough, the Hero is a damn wonderful beast.
2) Definitely not, you:ll be set.
3) You can still use it.
4) The ability to add on without needing to worry that you're violating Apple's rules.
5) The syncing isn't nearly as smooth, but you get over it. Drag and drop isn't that bad.
6) In my opinion? A pretty phone, with a lot of heart, but not the iPhone killer. Not by a long shot.
7) We've sent a fruit basket.