In case anyone doesn't know, Travis Brown rode a drop bar MTB at this years Leadville (see http://www.velonews.com/article/96645). However, Travis was stuck with cable discs as he wasn't as inventive as the guy who came up with this:

In case you can't quite make it out, the cables from the drop levers are fixed to pull the hyrdo levers fixed on the top of the bars (where cross-top brakes sit on my crosser).

From: http://www.velospace.org/node/21619