I'm going to try this out anyway but I thought I'd post it to see if anyone else has done this and/or endure some flames.
I have acquired some Bontrager wheelsets (various sources) and, after matching up and building out some bikes I find myself with several rear wheels and no more fronts. I plan to disassemble one rear and rebuild that rim on a front hub to match up my leftovers. These rears are "OSB" rims --meaning "offset spoke bed." Building a centered front wheel on an OSB rim will require me to dish it back to center. Should be an interesting experiment. (lots of wheelbuilding experience)