I used my blackberry tethered in Canada (US data roaming too rich for our plans). In the states I will "trust" a Starbucks, hotel, or Airport hot spot. Wont do any banking or anything like that. In hotels with wired, I bring along my Apple Airport Express, then all my devices can enjoy the one connection, and then I can also use my laptop on the balcony. My laptop will also act as a wifi spot when the hotel has a "one device" policy set-up. My dell acts as the MAC control, so they dont know I really have 5 devices working.
Andrew