Tinker's Workshop at the Berkeley Center for Appropriate Transportation (BCAT), 1336 Channing, 510-644-2577. Dave Campbell, Chair of BFBC, can be found at the BCAT on most days (cell: 510-701-5971).
Cycles of Change, a youth adventure and earn-a-bike program headed by Maya Carson and Barry Luck, 510-451-6304, cyclesofchange@yahoo.com. You can drop off bikes at several locations; see website for details.