In the future, you will be able to find pedicabs in just about any halfway dense urban core, along with private jitney services. Here's a list of all bay area pedicabs to the best of my knowledge.
• San Francisco: SF Pedicabs: along the Embarcadero, mostly for tourists; seems to get plenty of play. SF is super walkable. The longest-lived pedicab service in the Bay Area. Owner: Keith Saggers
• San Francisco: Golden Gate Pedicabs (est 2010 by a Boston company)
• San Francisco: Mission Pedicabs. (No name) This pedicab is run unofficially at night in the Mission! Check 'em out. (2010)

• Walnut Creek: Let's Roll Pedicabs, 877.ROLL4YOU; looks fun. Owner: Rob Vanoncini (BA, PoliSci, 89)
• San Jose: Eco City Cycles, 408.771.7723/7046; looks fun if you're in San Ho :)

• Oakland: Oakstercab (Uptown) - haven't ridden it yet
• Oakland: RadioGuy (Uptown) - broken rear axle, waiting for the comeback!
• Oakland: Backseat Driver (Uptown) - that's us! Owner: Ken Ott (BA, PoliSci, 01)

• Sacramento: VeloCab (2007+)
• Sacramento: SacPedicabs (2009+) Jake and Avan
• Sacramento: Dial-A-Bike (2009+) Harmon

Directory map: