I had the same thoughts as you initially, hearing about twitter and never getting around to setting it up, thinking it was just another waste of time (like facebook seems to be).
Finally set it up last week and im loving it! Great way to keep in contact with others about the latest happenings and I've already discovered 5+ awesome blog posts/products that I probably wouldn't have found otherwise.
My twitter is:
Twitter / timjrobinson
for all those interested in personal development and/or internet marketing/blogging.
Cheers, Tim