We have featured quite a few different all in one PCs here at Geeky Gadgets, although I think this is the first liquid cooled all in one PC we have featured, and it is made by PC manufacturer Asetek.
Inside the Asetek liquid cooled all in one PC is a 2.66GHz Intel Core i7-920 processor and an NVIDIA GeForce GTX 280m graphics card, and according to the manufacturer it measure just 58mm thick which is about the same as an Apple iMac.
It look like this liquid cooled all in one PC is just a prototype at the moment, you can see more details about it in the video below.
Engadget via Gadgetsteria