Its only fairly recently that I've started to feel that I can get anything useful from Twitter (and even now it is a case of filtering out the masses of irrelevant stuff). I find that it is one of the most useful ways of picking up nuggets of information relating to our industry.
I've put in a bit more effort recenty to my Tweet and will hopefully use it to post out a few littel bits of useful snippits relating to Sharepoint, Infopath and other such related stuff. Obviously I'd add in the odd bit of generally useless info about what I'm up to personally as well.
If you want to follow my Tweet go to http://www.twitter.com/steveej1