I travel extensively and my new standard question when booking a hotel is "do you have free high-speed internet". The trend these days is shifting towards offering free wireless net access in hotel rooms. But not every hotel has quiet gotten the clue yet.
Express
When I’m at a hotel that has wired (ethernet) internet in the room, I use one of Apple’s Airport Express to turn that into an in room wireless network. Also, then I’m at home, my Airport Express extends my in-home WiFi network so I have a strong signal in the living room and streams music to my living room stereo.

When the hotel only has dial up, then I’ll try to find a nearby free WiFi hotspot by checking Jiwire or HotPepper.