There are a ton of really good small footprint BT speakers on the market today. Bose mini, JamBox, FoxL, JBL, Monster and Logitech all come to top of mind (Personally, I've had the JamBox, Bose SoundLink and currently have the FoxL and love them all). The smaller ones (the original JamBox, JamBox and Bose mini's and the FoxL for instance) are mostly for on-the-go travel for use in a small hotel room or at home in a bedroom or small room). The Bose SoundLink and the Big JamBox can fill a decent size room for a party and still sound pretty good.
All in all, there hasn't been a better time to shop for BT speakers.