The final beta of WordPress 2.3 has been released. After this they do some release candidates, and then release the final WordPress 2.3 on September 24th.
From the Development Blog:
Beta 3, the third and final beta for WordPress 2.3, is now available. Many bugs have been fixed since the second beta, and we could use your help finding and fixing more bugs in preparation for the first Release Candidate due next Monday. The standard disclaimer for betas applies. Beta 3 is pre-release software that is still being tested.
I would love to hear what people think of WordPress 2.3 so far.