Man, I thought this was going to be about one of those KCS "Power PC" 8088 boards you could get for the 2000 and 500 back in the day. Nicely done!
I wish those cards weren't as scarce as hen's teeth (and priced accordingly), though...Pick up a nice clean 500 for a song, an ACA, plus a BPPC...it'd be neat to have to play with!
As someone else mentioned, I think the better bet would be to go with an A2000 solution (I think there's an "ACA-2000" coming? Yes/no?) and go that route. Mmm...PPC A2000 (yes I know there's a one-off using a prototype blizzard card out there).