I backported the ox820 led class stuff from WarheadsSE's kernel 3.1 WIP to the old 2.6.31 kernel.
If you're lucky, he might include it in the new kernel/modules that he's thinking about making
He already has the patches for it, and it seems to be working fine on my development POGO-B01.
It's a lot cleaner than the old hacky way of accessing the LEDs and gives a good idea of how much cleaner things are going to be in the 3.1 kernel compared to the nasty PLX patches in the old 2.6.31 kernel.