This is an ultra compact lightweight notebook from Asus which is also pretty light in the price - under $400. It has a built-in web camera and comes loaded with Linux OS. It has a shock-proof design and weighs in at around 2 lbs.
Here's another affordable lappie from Asus. It has an 8.9" display and is extremely compact and portable. Come packed with 1GB of ram and was a built-in webcamera and bluetooth.