I'll second Gwadzilla's post on Bikecentric ... TheWashCycle (I have been meaning to give this site some link love) is a fantastic resource for D.C. area cyclists. The site has only been around for a few months, but it is already packed with rich content. It's worth subscribing to the feed even if you don't live in the area as the author does a nice job elevating the local content to a broader context. Check it out!