http://www.umpcportal.com/2008/07/wibrain-l1-atomhsdpassd-umpc-details/ 500 grams ! Most EMR would absolutely die on this PC, Synapse would likely be very peppy.
Re: Cool Windows XP (or NIX) UMPC as a Portable Synapse Client - Cool, I thought the 3 pounds ASUS Eee PC was small enough. Synapse will fly on just about any PC speed wise. The only main limit is probably screen size, it will be hard to run it on a Pocket PC. Some other Ultra Mobile PCs