Not quite... my office build "ROGUE" (see my sig) only gets like 18-25fps at 1680x1050 when Crysis is maxed out, while my gamer build "AQUOS" gets 30-45fps when maxed out at 1920x1200.
So if three 8800Ultra's don't even run it at a straight 40fps at 1080p, I doubt three 9800GX2's would run it at 100fps at 1080p. Maybe 720p... maybe...
Plus i'm not sure you can have three 9800GX2's in SLI.