Personally, I think that the EVO virtual keyboard is much better than the typing on my TP2's old hardware keys.
All you have to do is let auto correct do its thing and you'll be typing faster than on your TP2 in no time. The size difference between the TP2's on-screen keyboard and the EVO's is no comparison. The thing is HUGE!!! Like everyone here as said, you'll love it. You have no idea how amazing it is!
Android is an amazing OS. It'll just be a slight adjustment learning the new functions of Android versus Windows Mobile. But first and foremost, you'll see just how buttery smooth Android runs on a 1GHz Snapdragon. No choppiness what so ever. I have never used a hardware/software combo that works as well as my EVO.
Check out
this post for some software advice. Just do some XDA and PPC reading and you'll be all set.
This phone is like crack.