Knobster? If my trek Pilot 5.2 doesn't have rack mounts, how do I have a rear rack mounted and carry dual panniers most days? I also commute during warm weather months on it without issue so far (~1,500 miles).

2-mules: I think it is exactly what you are looking for, as far as I know, it is about the fastest commuter/touring/race combination bike you can find.