Smaller Messages Window

I'm using the Messages app in Mountain lion, and I love that I can use it to message to phones as well as computers. The problem that I've found is that the chat window is way to big. Even reduced down to it's smallest size, it dwarfs regular chat windows, Like Adium. I like having my chat open mxt to my browser, or whateer app I'm working with, but the size of the messenger app makes this less apealing. Anyone find a way to change this?