Just saw that you can test Project Looking Glass through jws now!
http://download.java.net/lg3d/test/lg3d.jnlp
This will give you some applications (clock, ping-pong, image viewer, etc) from the incubator to play with aswell.
http://download.java.net/lg3d/test/lg3d_with_incubator.jnlp
Hm, jammed at 100% CPU here and running at what feels like 10fps… not exactly, er, impressive?
Cas 
i get a exception in the console while its loading however it runs okish, but crashes after drawing a red line with middle mouse button!
looks to be pretty decent but long way to go before i see it replacing my desktop.
It worked quite smoothly here, but it all seems to be quite counter-intuitive and a bit buggy.
Nothing but an empty black window covering most of the screen on OS X. Didn’t bother looking for exceptions.
Same here. Counter -intuitive. But it is all matter of habit, maybe.
Speed was good but still alot of exceptions being thrown - still it’s pretty slick.