I got stranded at BWI and found this to be the closest, least expensive, least scary economy hotel right by the airport.
The location is excellent, and they have an acceptably-priced "park and fly" option. T-Mobile Wi-fi access is supposedly available in all rooms. I opted for the "business" class room, which bundled internet, and local/long distance voice calls into the room rate for the same price as 1 night of T-Mobile hot spot access.
The room was clean, the amenities were minimal (no iron? no ironing board?), but I was clearly in a discount hotel. Still, I've stayed in far worse places, and I feel like got very good value for what I received.