I now have a 2nd datapoint. I have an XPS laptop with dual 8700-SLI in it and a 3Ghz Core2-duo. Weighs a ton
. It has 4G RAM and is using ZFS for /usr and /var (ufs for root) on two 320G drives (it's a big laptop). It runs in both 32bit and 64 bit mode and is 8.0p1.
Anyways... it works great! Again, I've only tested basic GL programs, but they work. The basic screen response is miles better than either of the earlier drivers.
SLI still doesn't work, but I gather that's "known". The driver appears to see both cards, but the monitors seem to attach to only one of them.