There are tons of photos that are better than mine, so I only included a few. Below my photos are links to other photo sources.
SpotTheShuttle2012, a gallery on Flickr.
The gallery embedded above holds photos by other people, which I have 'favorited'. Initially, all the photos are from NASA Headquarter's photostream.
Photos are also being collected in the Space Shuttle Discovery group.
Rocketeer Todd Harrision posted his most excellent photos to Facebook (may require membership): http://www.facebook.com/media/set/?set=a.10100448756460266.2586587.1507207&type=1.
Some via WaPo's Capital Weather Gang.
Video: The Spacegasmic Shuttle Fly-Over of 2012 - DCist
Whew, I think that's enough! When The Big Picture inevitably posts their album, I'll separately post the link. If you see it and I haven't posted it, please let me know!