I have a Sony Vaio VGN-S4. It weighs less than 2kg, fits in a small case (in a protective slip cover) and I got a deal which meant it was only £1k.
It comes with dual CD/DVD/R/RW, Magicgate/ Memory stick, two USB ports, wifi, ethernet & modem ports, Centrino, etc.
Also has black screen so resolution/ picture is great!
There are a few more arrived on the market for around the £1200 mark, which have smaller screens, but this is like widescreen so watching dvds look better.
It's a mouse touchpad, which is fine, but I bought a Teleadapt wireless mouse from BA onboard for £20 to use as a remote control for the DVD!!