Martin...
I agree, unless you are in the business of self promotion (which I'm clearly not) then twittter really isn't a business tool at all..
What it is though is a great way to hear what people are up to. I was reading a book by a scifi author today, and subscribed to his twitter feed. And he took the time to say hello to me and we exchanged a couple of message.
For those who don't know.. Twitter is like that little thing at the top of facebook which says 'Psionandy is .......' and people update it on a regular basis, message each other etc. Like a tiny microblog that you can update on your mobile phone.
It works great on win mobile by the way.. and mine is
Twitter / psionandy
and m