Rob,
I've installed VE on one of my slave machines and it's working fine so far. My soundcard on the slave is a Wavecenter PCI sending back lightpipe to the main DAW (using MOTU 2408 mk 3, running under Sonar) -- buffer size on the Wavecenter card is 128 samples. I left the VSL Latency Configurer to 0 and set the latency to 'default' in the VE preferences. Anyway, everything seems to be working fine so far. If you want to know more tech particulars, just ask.
Mahlon
p.s. Vienna folks, thanks SOOOO much for the new interface, It's awesome and I'm already hooked on it. So easy to use!![:D]