I can confirm that my Sonnet Encore ST G4 1.8GHz works. System Monitor identifies it as a 7455 with 256KB L2 cache and no L3 cache but from all the specs i've read it should be a 7457 or 7447 with 512KB L2 cache and no L3 cache. Could be Sonnet's firmware patch doesn't identify it correctly i suppose.
"We live, we die, we laugh, we cry"