Can I make the Compiz Scale plugin show minimized windows as well as maximized ones? (I'm using Maverick, if that helps.)
Unfortunately, no, because the version of compiz in Maverick was released before this feature became available in compiz 0.9.x. This feature will most likely be there in Natty, due to a newer version of compiz, but not in Maverick.
Update: In Natty I'm not seeing this option (though I read about compiz 0.9 getting it. I will have to try to ask Sam about it.