Any recommendations on where to go to get PowerTap laced to a new wheel?
I have a wheel rebuilt at The Bike Rack.
You may also want to check out Bill Mould.
He is renowned wheel builder based in Alexandria. He also runs a wheel-building class. I don't know if there is anything special to PowerTap hubs that require special building knowledge though.
I just got a PowerTap hub laced into a wheel a few months back and it has been working great. The bike mechanic who built it up is a friend and former coworker who parted ways with Conte's and decided to start his own business:
He provides top-notch / professional service, accepts credit cards, and is conveniently located 2 blocks from the Clarendon metro station.
I've referred many club members to him and they've all had great results as well.