I think that thing looks pretty badass. A "city 29er" Eccentric BB = awesome, a derailer hanger makes the whole thing more versatile, and that thermos holder is great.

The rear disk means that it can't be ridden fixed though which is too bad. I'd rather see V brakes in the rear, and a flip/flop hub

All in all at $500 a very decent value if you want a heavy duty fat tired SS city commuter, but if you think you want fixed I'd skip it. Since it would require ditching the rar brake, AND rear wheel.