Man.. I've been too lazy to play around with mine. My HHKB came with a HASU controller but it stopped working after an hour (key presses kinda stopped registering). The previous owner had tried to reprogram it back to default (stock HHKB) config for me before I bought it because he had it customed to a DVORAK layout.
I've been meaning to give it a try and figure it out, but I'm not sure what state the HASU is in right now or if it's just borked. Has anyone seen this happen?