Hmmm. Interesting

I've just found this case Scan.co.uk: Antec ISK 300-65, Black Mini ITX, Steel, eSATA/ 2x USB 2.0, 65W PSU, 2x 2.5" / Slim Optical Bays

It has a 65W PSU. What could you power with 65W. I just used a psu calculator for a rough guess of components I would have (ION with Atom 330, 2X2GB DDR2 PC2-6400, 1 SSD, 1 pci-e tv tuner, 1 80mm case fan) at it reckons 155W.