I'm going to wait and read the early reviews, and wait till someone opens one up to see if they can be hacked to add more memory.
Knowing Nokia, they'll bring out an "i" version quite soon which fix the deficiencies of the first version. I am surprised they made such a device - the Simpad hasn't exactly been a roaring success across the whole of Europe, and the Nokia 770 isn't really different in functionality, just in size and spec?
Give it a little while and pick one up cheap on ebay. That's what I'll be doing if they turn out to be any good.