I've never actually used Twitter, but it seems to me that if the question can be expressed in 140 characters or less, then the answer could probably by found quicker and more reliably by typing it into the search box on SQLServerCentral, especially if the results are sorted according to how the topic or answers were rated. However, if someone has hit a snag while trying to do something like configure DTC, and they've already tried step by step instructions on MSDN, then I can see how tweeting with a group of subject matter experts in real time would be very helpful. On the other hand, it does seem like a lot of clutter to sift through.