150mm rear end, 68mm BB shell, 31.6 seatpost.
If you are getting a frame only, check out the crank options as it'll either be simple or a headache to fit a chain device. Best bet is to go with a 57.5mm chainline / 83mm axle crankset if possible. I've also managed to fit 73mm cranks (XTRs and Saints) so it is do-able, just a bit more work for the right chainline. 83mm is a beeze to fit, just needs 2 5mm collars to 'convert' to the 73mm shell.
The frame rides amazingly, I love mine. It's a fast ride well suited to DH tracks and takes the big hits well. It's fairly stiff and tracks well on off camber.
Don't be fooled by the number in the travel spec - it's not how much, it's how the bike delivers it. I've ridden 9" bikes with a straight to falling rate and it's possible to blow through the travel. The Commy linkage gives a nice rising rate and is very controlled.
I much prefer it over my Yeti Mono 9 that I had before, it feels tighter and quicker but isn't fazed by big hits. It's taken some great riders to podiums so it'll go all the way if you can.
Here's a shot of me drifting a turn on mine at the Masters Worlds in Pra Loup this year!
http://www.downhill911.com/pictures/img.php?img=./home/Praloup-Championnats-Monde-Master-2008/Praloup-2008-Master-33.jpg