Ubuntu team has just released first beta version of version 10.04 named beta 1 two weeks ago. Now the another beta version of Ubuntu has just released named beta 2. There is no any significant improvement in beta 2 but there are minor improvement and some tweaks has been solved. Before beta version three alpha version of Ubuntu has been released. you can download the beta 2 version of ubuntu from ubuntu official website.
Some Major improvement in beta 2
The Ubuntu user can get facilities to use the music store as the rhythm box plugin.
The bookmark of Firefox bookmarks has been changed
Mobile contact sysnc is available including iphone application