From their FAQ:
Q. Does the Touch Book support multitouch?
A. No. And we don't think that it's an issue
Q. Does the Touch Book use a stylus?
A. There will be no stylus
Q. Can the Touch Book be used with an external monitor?
A. This feature is still under development. We will update the website as soon as the final decision has been made.
YouDontReallyNeedThat™
In my opinion, this should be called a Mobile Internet Device like the Nokia tablets, not a Netbook. ARM is underpowered compared to even the Atom (which only uses 2 watts of power, it's not "Power-hungry" considering what it does, and it's 2-3x as fast as their system-on-a-chip.) I also like how they don't have any screenshots of their OS running on their website.
According to PC World, it costs about $400 with a keyboard.
Get a real netbook, an OpenPandora, or wait for Nvidia to launch the ION platform in a netbook if you want performance.