Want to hear and participate in a thought-provoking discussion about planning regional transportation? Tomorrow at 12:30 p.m. you can head on down to SPUR's (a.k.a. the San Francisco Planning + Research Association) office at 312 Sutter St. (@ Grant), 5th floor. While open to the public, it will cost you $5 if you're not a member (membership details can be found here). The discussion will involve regional social justice, transit, walking, and bicycling advocates, and is coordinated by the Transportation and Land Use Coalition (TALC), in an effort to influence the next Regional Transportation Plan....