Lots of chinese 3rd party no-names are making "mini-PCs" running android. There are problems - the android ecosystem has spotty keyboard/mouse support (drag scrolling sucks with a mouse and pinch operations are missing). Also the usual quality concerns with cheap stuff -bad WiFi and heat problems. Finally, remote wake support is poor, so a lot of the devices have no real way to turn them on/off besides unpluggging them.

But they exist and have a sizeable community around hacking with them, primarily as TV boxes. The Ouya should bring this usage into the foreground, plus Dell's plans to make the first brand-named device in this market.

Actually, WinRT is a better OS for this space since it's designed front-to-back with keyboard/mouse and touchscreen support (incl app market requirements) but MS is being their own worst enemy with that platform.