I have installed OS X Lion 10.7.2 on a ep45 ds3p with a q9300 and 4 GB of RAM. The installation is with unibeast and multibeast and everything works.
The only problem is, that the mouseover won't zoom the dock or show the menubar in fullscreen apps. I tried this with a wacom bamboo pen & touch, a r.a.t. 7 contagnion with OS X support and a Magic Trackpad.
It would be very nice, if someone could help me.