BWI hotels (SWA discounted)
I've stayed at the Microtel, the Wingate, the Ramada, and (once in a pinch) the Red Roof Inn (blargh). Seems like most guys stay at the Ramada, as it had good van service and was about as good of a SWA discount as I could find. I believe it was $59 plus tax. Call ahead to make sure they have room and can give you the discount. Sometimes all the hotels fill up, due to stuff going on in DC.