Just letting you all know that Ubuntu Lucid Lynx Beta 1 has been released a few hours ago. Get it here. If you have been using Lucid Lynx Alpha, you can simply update your package repositories and you will have the Beta 1.
Also, Kubuntu 10.04 Beta 1 has also been released. Kubuntu also has a Netbook remix now. Get them here.
Enjoy the new themes and features.