I've got a few pairs of liquicell MTB shorts (baggy outside, with attached spandex/lycra liner) and also wear wicking boxer briefs. I know that I should be wearing the lycra commando, but it just feels weird coming into work that way. Plus, I've got to wear them on the way back. Anyway, the wicking boxer briefs are the best thing ever! I even prefer them just for walks around the neighborhood or when working on my house as they eliminate all chafitude.

I got all of this cheap at Sierra Trading Post.