I really hope he doesn't try to get it in a desktop A1200. A tower design would be much better. More room for components and a somewhat bigger board can be used that would keep the costs down and would also allow a normal DIMM slot.
This thing is only usefull for when used with a Mediator and a VooDoo 3,4,5 anyway.
Phase 5 should never have tried to make the BlizzardPPC for a dekstop solution also.