Make my vote Mac OS-9 version as top preference, then Mac OS X Client. The way they are going with Mac OS X Client, the empeg software should turn up first ;-). In my case I'd prefer USB. I only have a Mk 1 at the moment, and I don't want to have to go out and buy an ethernet hub either. I have two perfectly good USB ports :-)

Have had a look at writing a USB driver so I could try sending commands to the empeg over USB like you can over the serial connection (is quite cool :-) ), but so far it wasn't any more than a look.
Am also a very willing beta tester :-)

(list 6284, S/N 00299, 4 gig blue)