Where is the best place to trade namecoins to bitcoins?

Through merged mining I've gathered several namecoins and have no desire for them. I simply wish to trade them for bitcoins (or litecoins). Unfortunately the two places I've looked (Cryptsy and BTC-e) seem to have VERY shallow markets. I'm afraid unloading these there might be problematic.

What does everyone else do to unload these?

Out of personal curiosity, does anyone know of any schematics for a USB ASIC miner?

I'm curious about them, and was hoping someone either reversed engineered one of these suckers or that an open source (hardware) miner existed.