I have 10.10 Netbook Edition (with Unity). If I hold down the Super key, I see numbers on the the app icons (including apps that are already open). If I hit the number for an app that is already open (say Firefox), it opens all my Firefox windows in a small version.
At this point I can actually interact with the small versions of the Firefox windows and use Alt-Tab to switch between them. But what if I want to select one of the Firefox windows to be normal size? I know I can click on it to do that, but how do I do it with the keyboard.