>I noticed with certain applications like Gimp, k3b, etc. it is very >difficult to maximize a work screen--I have yet to figure it out.
As Anselm pointed out, you probably want to hold down your modifier key (default Alt) and use mouse buttons. A "maximize" could probably be written by raising whatever window's clicked on, and switching to monocle ([M]) layout. I actually used to run gimp under ion in its equivalent of tiled (=[]) mode. It's not so bad, really. I have a key bound to "toggle between monocle and tiled" that would make this pretty straightforward. But it seems like whenever I need to use Gimp, my wife is logged in and using Metacity, so I haven't had the opportunity to try.