I have ridden motorcycles off and on for many years - on 3 continents. I just want to say that I think that lane-splitting is a BAD idea, and even when I lived in Cali, I saw it as a pretty dangerous process. I would never do it, personally.
There is a entire universe of idiots, drunks, incompetents, and drivers with other types of deficiencies out there EVERY DAY! You are barely safe against these folks in another 4 wheeled vehicle, never safe on a bike, especially in California (Bay Area is my main experience, don't get me started). Why try to get between them in a non-lane, when they likely don't even see you at all? Big hurry? Bad reason, as recuperation times are long.
Really really really bad bad bad idea. Sorry.
BTW- I selected category 3 above, as that's what I want drivers to do when I am on a bike, be predictable, DON'T HELP ME!!!!
(Stepping off soap box, shutting up, going to room quietly...)
