Applied the timing fixes to my 2B board, still locks up soon as I run pciinfo.
I've uploaded a video of it crashing:
http://www.youtube.com/watch?v=LRHvLSK1lUk
Try the bare mediator without the accelerator. Might also try a os3.1 bare bones install enough to see if the mediator is working then. This of course assumes you can do it in the 2M chip ram on a stock machine.It should at least prove the mediator is ok and then you can add stuff back in from there.