To thank Mark Shuttleworth for the invitation to UDS in Prague, I’ve asked him what he would like to see in Compiz. He send me a mockup of a new switcher plugin based on the idea of Matthew Thomas. And here is my implementation of it as Compiz plugin called stackswitch.

You can download it from Compiz Fusion git:
git clone git://anongit.compiz-fusion.org/fusion/plugins/stackswitch