I'm looking at getting a wheelset with disc hubs and rim brakes to run on my disc and non-disc cross bikes. There are stock wheels that have velocity a23 rims, which are a poupular rim brake compatible rim. However, the stock wheelset tend not to have machined brake surfaces.
Is not having a machined brake surface a problem? Does it matter whether the rim is painted or anodized?
It seems like some old heads seem to think that a machined sidewall was a marketing gimick made to stop brake squeal on new showroom bikes. Rivendell sell a lot of rim brake wheels without a machined surface.
Jobst Brandt via Sheldon Brown: http://sheldonbrown.com/brandt/machined-rims.html
Rivendell (probably via Grant Peterson) http://www.rivbike.com/kb_results.asp?ID=52