WordPress 3 has finally been released for bloggers.

Major Changes And Features in WordPress 3.0

-The Default Theme is the new sexy looking “Twenty Ten”
-Easy Implementation of Custom Backgrounds, Headers, Shortlinks, Post Types, Taxonomies and Menus
-Multi-Site functionality with the merge of MU and WordPress
-Contextual Help Function t the top right on every screen
-New Updates Tab in Dashboard for a Single Click Update of Entire WordPress Core, Plugins.
-WordPress claims it has fixed 1127 bugs and feature enhancements

You can down load it from WordPress site.