How to
There is a way to do this by using Better Touch tool (
http://blog.boastr.net/)
1) Add a new GLOBAL gesture
2) Touchpad Gesture: e.g. Three Finger click
3) Predefined Action "Close window below cursor
Works in Mission control and any kind of expose by mouseover + gesture ...
--> closed window text will stay till next time opening mission control...
but thats no problem for me...
hope that will help u guys...
try it out.really good tool.