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I'd suggest making arrangements with some Greenbelt and other anti-sprawl folks to guest-blog on the topic. After each day's ride, call in and chat with the writer du jour, and let them do the hard work of writing and researching. They can give us updates on your ride and fill in with their special area of expertise.
I've been in the Bay Area for a number of years, so Sprawl is a topic near and dear to my heart. In my town they are working to change the ugly mini-mall-car-dealership sprawl of El Camino Real into something closer to a real city: http://www.mv-voice.com/story.php?story_id=2830.
As you travel around the bay I'm sure there are many such stories: neighborhoods created through infill, open space preserved, green buildings, and other reasons to hope. I look forward to having you share them with us.