I have tried a number of portable speakers for my use with my 3G iPhone. When traveling for work, I like to be able to listen to music in my hotel room either from my iPhone directly or via applications like Simplify Media, Pandora, LastFM, or even IceCast stations. I own several iPod portable speaker like the Altec Lansing inMotion series, but in every case, I have to deal with the iPhone incompatibility message and the typical GSM buzzing noise that occurs when the phone radio is active.