We just announced the Confluence 3.1 beta on the Confluence Blog.
Confluence 3.1 is a major new release with many new features and improvements like support for embedding OpenSocial gadgets, Office 2007 support, and a number of significant improvements to the editing experience. You can find out more details on all Confluence 3.1 improvements in the blog post or from the 3.1 beta release notes.
Try it out and let us know what you think!

Confluence 3.1 Open Beta – We want your feedback