on the point of system specs I dled it about a month a go, so I don't know if I've got a beta or anything but it ran fine on 1152/xxx res on my computer (P3 500, 512 meg, Geforce 256 Win 98 SE.)
The frame rate isn't great in towns and I've got to set draw distance to minimum, but it still looks very nice. I actually noticed that it didn't make much difference what res I ran it in before 1152...the fps was the same pretty much. Anyway, as a result the game looks excellent in dungeons (with about 20 fps), and pretty good in towns though a bit jolty and things tend to appear in front of you
Also, I remember reading on one of the boards a few weeks ago about an unofficial patch released that made it run reasonably smoothly in town on a P3 600, but otherwise with specs identical to mine, so that might be worth getting.
Anyway, I'm still going to buy a copy, so I might get it now rather than when I get my new computer to see if there's any difference in the versions...I wouldn't have thought a beta would have better fps than the final release would it? Anyway, hope that helps with people considering getting it.