Thanks, Mike. I did visit Alan Wu, and asked him about his time with Spokewrench cycles. Alan said with a smile, "I
am Spokewrench Cycles." He's modest, affable, and quick, and has enough history with Rohloff that they asked him to be their Canadian agent.
Here's the Spokewrench website:
http://www.spokewrench.com/ You'll see from the "Categories" menu on the RH side of the home page that Alan does offer wheelbuilding services.
Let me ask, though: have you considered Peter White in NH? I should have thought that as a US-based shop, that option would be easier for you. Here's the link:
http://www.peterwhitecycles.com/index.html He has a very good rep for wheelbuilding, sells Rohloffs and Rohloff-equipped bikes, and you'll see from his home page that he works on tandems.
While researching my Raven, I had looked into buying one of Peter's bikes, but the price would have been 40-50% more the ~C$4000 which I finally paid for my Raven. Much of the difference was due to duty + GST on the complete bike, plus the then-escalating exchange rate between the USD & the CAD
Hope that's helpful,
Cheers, John