I've got my 2009 Lenz Leviathan 4" travel medium 29er frame up for sale. These frames are handmade right here in Colorado! I bought this Lev at the end of 2009, rode it for ~10 months in 2010, and it's sadly been hanging on the wall ever since due to changes in sponsorship. I've been reluctant to sell this frame because of how spectacular it is, but I'm moving and it too needs to move on to a new home. The frame, one of the lightest Al 29er full suspension frames out there, is in very good condition. There are a few small dents on the gusset in front of the BB shell from rocks being kicked up, but other than that, there are only a few cosmetic scratches in the anodized finish.
For details on the frame and geometry, see
http://lenzsport.com/detail.php?prodID=9 This is essentially the same frame as what I have except the chainstays on my frame are ~0.25" longer.
I'm asking $1200 for the frame with a Rock Shox Monarch R shock.
For $1300, I'll put on a 2010 Fox RP23 shock that was used for ~3 months earlier this season.
I also have a custom Revelate Designs frame bag that I'll throw in. It's in great shape and would run ~$150 new. I should have a couple spare derailleur hangers to throw in, too.