OK, it's pretty expensive at Â£365, but it just looks fantastic. Intel Atom processor, loads of connectivity.
Read a review at The Register
"The mbook measures just 158 x 94.1 x 18.6mm and weighs only 315g, yet its diminutive 4.8in display has a 1024 x 600 resolution and appears to be stylus operated. A speaker sits on one side of the screen and a 1.3Mp webcam rests on the other."
"Two versions of the machine appear to be available, one with a 1.1GHz Intel Atom processor and another with a 1.3GHz option. Both come with 1GB of memory, but the Flash-based storage provided ranges between 8GB and 32GB."
A hands-on mini review is here