Thanks for all the great replies!

After today's commute, what I found was that I would not be comfortable lane-splitting. There just seemed to be too many erratic drivers who change lanes pretty quickly, or also sometimes people who were double-parked (which made everyone switch to the left lane). Also, if you're in the middle, and the left lane is left-turn-only, then you're stuck trying to merge in to the right lane from the left side.

What I ended up doing was filtering on the right, though slowly. That is, we'd all come to a light, I'd be 3 or 4 cars back, and by the time the light turned green I'd be right up there at the intersection.

Also, in general for intersections with lights, I found it to be most comfortable to just take the lane and sit with the traffic. This gave me a rest, and also showed the cagers that I was following traffic laws like any other vehicle on the road. That said, with all those lights, it made for a pretty long (time-wise) commute.