I bought one of these when I bought my first ipod mini 2 years ago, and I still don't see why I spent my money on it. It makes my ipod stand up, and that's about it. It's got a 1/4" output, but so does the ipod... You just have to take the effort to plug the input cable to the ipod's headphone jack instead of keeping it permanently plugged in the dock.
They say it keeps you from reaching behind your computer every time you need to plug it in... Just wrap your cord around something so it doesn't fall behind your desk instead. Not as sleek as a dock, but a lot cheaper. The dock looks cool sitting on my desk but it's not really functional as anything more than a cable- and paper-weight