I just got a Harris Cyclery hub and a closeout Mavic open Sport rim from my local LBS and laced it up. First time building a bicycle wheel (although I've built a few spoked wheels for motorcycles before) and it took a few tries to get the dishing and tensioning right. It cost less than $100 total and took maybe 3 hours. I rode it for a shakedown ride and then up 3 gap. It worked great, and having the flip flop hub was big help on the monster climbs. (16 and 18t)

Az