WiSE Zone provides wireless internet at coffee shops in the DC area. The rates seem a little high -- $0.20/min. for pay-per-use, $6.95/day or $19.95/mo. for unlimited service at a place where you spend more money to buy coffee and munchies. But, if I were travelling on somebody else's dime, it would be worth it for the potential productivity (assuming I didn't spend too much time reading and writing blog stuff).