There are lot of news around Ubuntu Light and Unity, I have tried to gather most of information about it. It's general and floating around Internet, I have tried to make it on one stop . Also covered Unity Ubuntu Netbook Edition Installation on Ubuntu 10.04 LTS (Lucid Lynx), hope you like the desert :).
Q: What is Unity Ubuntu Netbook Edition?
A: A Lightweight Netbook Interface for Netbooks / Desktops.
Q: That's ok! But, Can you give details?
A: Here is bunch of links that will help you to get up-to-date about Unity Ubuntu Netbook Edition, Ubuntu Light.