In one of those pics, you can see the FPS. I think it's around 44 or so. I can get over 120 in WoW, so it's a bit slower than I'm used to. But 44 is definitely playable. I ran around for a whole hour without a crash. Last time I did that in Iris, I could only get about 5 minutes in before it would die. Lots of artwork is in also. They've taken a bunch from UO-3D (good because I like the creature renders in that better than the goofy KR stuff).
I doubt OpenEUO will work with it. You'll have to ask the OpenEUO peeps.