its been a few years since I've ridden across the bridge, but if I recall the bike facilities there are already pretty sweet. There are 2 wide sidewalks, one on either side. One is reserved only for peds, the other for bikes. The only problem is riding around the pillars, some folks fly around those blind corners.
I agree this wouldn't be the end of the world for bay area cyclists, but ... oh screw it, just stick it to the cars, not the bikes! :-)