There's a TON of talk on here about people needing racks and panniers and trailers and every other type of cargo-carrying device ever fitted to a bike, just to ride to work.
What is all this stuff that you guys are carrying around? Personally, when I drive to work, I take my wallet, my keys, my cell phone, and that's about it. When I ride, I also taking a change of clothes, so I don't have to wear cycling clothes all day.
What could you possibly need to move back and forth to work everyday that required a trailer?