Dang, there's a whole new field for me to get into: fitting commuter bikes! It's true, we do need to be fitted differently. (touring bikes, too.)

The specifics for the waist down should be pretty much the same, but the waist up is going to be different.

My boss does athlete fits, but I don't think she does commuter fits. Oooh, now I gotta do some research....

Meanwhile I can recommend one of my favorite bike books:

The Essential Bicycle Commuter by Trudy E. Bell