Nathan Frechen
I have a Planet X Jack Flash (older style) in the Little Audrey paint scheme. It's more of a dirt jump/DS type of frame than a true MTB frame, but it works well as a MTB frame as well. Only selling because with a super low top tube, I need too much seatpost to feel comfortable riding.
Yes, it's older, but it's a great frame. Aluminum, gussets everywhere you could imagine. It's overbuilt - yes, even for me - but in a good way. It's a striking frame and would work great as a freeride HT/dirt jump/dual slalom/possibly Super D bike.
Not mine, but her's a picture of the frame: http://www.moredirt.co.uk/ratebike.php?id=2650
It's a unique-looking frame that's in pretty good shape. I've had it since 2004 (bought it used from the original owner) and have ridden it probably 75 times since then (none in 2006-2009), and works great when pointed downhill. I'm looking to get $175 for the frame, and also have some other MTB-style parts if you're looking to put something together.
-Nathan