Hi all here is a cool new tool I am trying out… seems to work good…
http://www.palma.com.au/winroll/
can make windows “Roll up” Transparent, always on top, and a few other cool tricks…
I use always on top with refrence pictures in my explorer browser and Zbrush 
I use it with my calculator sometimes also…
well its fun to see wallpaper in IRC chat also :)… all kinds of uses!..
It has not effected anything on my system yet, but please note that it is experimental…
But realy COOL I use it all the time now