I collect El Beastio tonight from the UPS depot.
Watch this space, for I shall fill it with drool and ravings when I get it home.
Edit: It's here!
Blimey, it's big. Quite heavy, too.
Fast. As. Fook.
If you're going to BootCamp one of these, perhaps read this: http://support.apple.com/kb/TS3173
I had a few sweary, sweary reboots before doing this. Magic mouse? Dunno. It looks nice, but I haven't even turned it on. I like my Logitech best of all!
Left4Dead 2 and Unreal Tournament 3 run at full speed with everything turned up at 1920x1080, which makes a very pleasant change (on the old iMac, I had to run L4D2 at some unfeasibly low resolution with everything off just to keep the framerate up).