HotelChatter has done an excellent roundup of the best WiFi hotels in the biz, including Kimpton's (who will position a Linksys Wireless Bridge near your room if your signal strength is teh suck), and my favorite, the Holiday Inn Express:
Sure you are going to get a basic room, but usually at a low price, and if you throw in free wireless then most people can be happy, at least for a night. Most, not all (check before you go) Holiday Inn's have free wireless in the lobby and some sort of free broadband in the guest rooms. Depending on the Holiday Inn you may run into port blocking, and in general, a good rule of thumb is expect most of these free Internet services to come with some sort of limitations.
(Thanks, Mark!)
