I just played with one at Radio Shack. I was worried about the keyboard being as cramped as the Hero. When I type on the Hero, it gets almost half of the characters I type wrong, but the spell correction fixes all the mistakes. With the EVO, it got 99% of the characters right and it still has the great spell check that the Hero has. I typed much faster on the EVO with one hand then on any Blackberry keyboard I have used with one hand. Anyone switching from a physical keyboard doesn't need to worry about the keyboard on this thing, the screen is big enough to give you plenty of space for each key, and the spell check will definitely correct any mistakes. I am pretty sure that I could type without looking since you only have to hit in the general area of each key. I can't wait for mine on Friday!!
Edit:
That was only using the portrait keyboard! The landscape keyboard is twice as good due to twice the width!