This looks very nice. I finally installed Ubuntu Hardy on my main desktop and got dual monitors working after a lot of hassle, but now I'm excited to try this out. Going to hold off on the beta until a final release though
The first time I've ever had dual monitors working in Linux was two days ago when I installed Intrepid. It took a couple of clicks and (unfortunately) restarting X. Compiz doesn't work with Xinerama (multiple screen support) either. I don't really need the extra space, so I stick with my large monitor and turn off the laptop display.
You're right it is. Some cards work wonderfully, the one I have has apparently "many reported problems" trying to get it to work with fglrx drivers
I stuck with Radeon for now. My only loss is that I can't get any desktop effects on because my Virtual Screen size is over 3000 in width which far exceeds my cards limitations. Would be nice if it could somehow "ignore" the second monitor (my TV) only until when it's on so I could get the effects.