News flash! I am heading off to hike the Pacific Crest Trail starting in late April 2012. Blog at pct.eisenbud.net.
Now there is a picture of me on top of Mt. Katahdin at the end of my thru-hike of the Appalachian Trail in August, 2001. See my Appalachian Trail page if you're curious to learn more about my adventure.
Some more pictures are here.
I work at Google.
You can email me at eisenbud+www@cs.swarthmore.edu.