Andrew broke 3c59x.c on non-little-endian machines and those not supporting virt_to_bus/bus_to_bus in pre6-6, I've let him know about this. :-)
Starting to make more progress on my VM hacks, the anon layer was just the beginning. I hope after the 2nd or 3rd pot of coffee tonight I should have something that at least remotely resembles what I want it all to look like. If I arrive at something people can at least play with, I'll post patches.
The Sun IFB/Expert3D card turns out to be an Intense3D chipset (the Wildcat 4110). Their site claims a Linux driver around the summer, but I bet the fucks will do binary only x86 drivers which essentially screws over any chance of legitimate Sparc/Linux support.