I am somewhat of a twitter user. I have an account, I tweat once in a blue moon. Personally, I find facebook status updates to be much more compelling than twitter. Dennis Stevenson has an interesting blog entry about how twitter helped him get customer service issue resolved.
The facinating thing about his story is that you can search the Twitterverse (all tweats) for specifc phrases. Twitscoop is a site that lets you do this. Trolling the Twitterverse for mentions of your company … an interesting way to find your customers with issues!
Other thoughts for twitter might be to use it to send alerts about video events. Anyone looking at that?

