I often need the info window open when sorting and cleaning in my song collection. I have the info window open besides a Windows Explorer window in which I delete and move songs. I know I can permanently delete songs directly from the info window, but firstly it isn't possible wihtout using the mouse, and secondly I can't do all the stuff I need to do (move, rename, sort, etc).
If the info window was a proper window with a taskbar button, I could switch between it and my Windows Explorer window without any hazzle. Now I have to press the info-window-hotkey-button twice every time I need to go to the info Window. It's a pain in the ass, but not more than I can live with.