Windows Mobile and keyboards

I know I shouldn't post questions in the chillout room, but this is a question about Windows Mobile so it doesn't fit elsewhere.

I just hope somebody here is enough of a Windows geek to know quite a lot about Windows Mobile

My first question is the geeky one: Can I use an external keyboard with these devices? If I can, is that bluetooth or wired?

And second, what about the inbuilt keyboards? From what I've seen XT9 is sort of standard but what about the 20-button qwerty layout and the pure touch ones? Do they use the same system?

And if you can't answer I'd be more than thankful for just a link to somewhere where they can answer...

Big thanks / O8h7w

Hello? Anyone here have a clue?

I've at least seen a keyboard that claimed compatibility with some of these devices, but it was bluetooth one that I didn't want to use. Funny how the only good keyboards out there all are glued to the ThinkPads... :)