Damn, Dave Winer jumped onto twitter!
I wonder how twitter fits in to corporate life? I'm not sure how smart it would be to twitter from a meeting. It could be dangerous even. You need to think before you write or you might leak something!
I'm not sure how good it is to twitter links. Isn't it better to del.icio.us them? You have tags and all these tools to handle your links, which doesn't exist with twitter.