UPDATED: blogroll updates

noticed that the blogroll had some stale/dead entries on it, so i updated with some sites that i've been following.

gone:

dc under construction — hasn't updated since last august
off seventh — brian retired his blog at the end of march scratch that, brian just restarted the blog yesterday (woo hoo!)
snapshots of a life (in truxton circle) — hasn't updated since last august

added:

new columbia heights and the heights life — two newer blogs from up in columbia heights
greater greater washington — david alpert's amazing blog covering everything about life in dc. the transit studies caught my attention, but i stayed for the insight into everything else...