I heard yesterday that lanesplitting was in the news in California. I tried to find it online, but only found that the CHP was defining what is considered safe lanesplitting. Click here for: California Highway Patrol Web Page on Lanesplitting
I, of course, feel that it's only safe if done in a Tango, which is narrower than many motorcycles, and can react more quickly, as proved in the Consumer Reports emergency lane change test during the Automotive X-prize competition.
Imagine the reduction in traffic and parking congestion if single-occupant commuters started using the right tool for the job! The Tango fits in half a lane with more clearance than a truck has in a full lane.