One thing I've always been curious about too. How come DH frames are so much more expensive then XC or AM frames? It is just volume? I can't imagine more work goes into a DH frame than xc or am, considering how much they tweak those frames for weight and such.
Hahahah expensive man try looking at a $10K road frame or a pair of $3K wheels!
http://www.artscyclery.com/descpage-CV1R5CA.html
AAHAHAH