Agreed. There's been some movement towards better voting systems, but proportional voting seems consistently to be bottom of the barrel of priorities.

http://www.fairvote.org/ - Promotes IRV, and I think they were in favor of proportional representation, but I can't seem to find the pages now (go figure).

http://www.equal.vote/ - Promotes a customized score voting system, which seems more solid than IRV from my reading, but no mention of proportional representation.

It's too bad, really, I'd be hugely in favor if something like this came up in a CA statewide ballot/proposition.