After the longest beta-testing period in moodle's history and nearly a year after Moodle 1.8, Moodle 1.9 is now ready for use. Major new features include:

• An all-new Gradebook.
• Integrated support for Outcomes, so that learning goals can be tied to individual courses and activities.
• A huge increase in performance.
• Tagging is now a core function. Easily link things like users, blogs, courses etc as well as external sites like Flickr and Youtube through the use of simple tags.

Read more at http://moodle.org/mod/forum/discuss.php?d=91667