Mountain - This looks like a fairly old frame, but titanium is pretty ageless, so expect to see them changing hands for lots on money well into the future.
XLM - A very nice Extra-Light Mountain that TeamCow spotted down in Canmore. I wouldn't be surprised if this bike was 21 pounds. And it's painfully expensive too.
Fat Beat - A couple of East Coast companies have tried Cannondale's HeadShok system, to poor results. This bike really looks wrong.