In a new blog entry Lukas Smith notes that the latest alpha release, version 2, of the PHP 5.3 series is now available for download from the PHP QA website.

If you check the qa website you will see that there is a new alpha release of our next minor version PHP 5.3.0 out that is awaiting your testing (remember no whining about BC breaks if you did not test the pre-release versions). [...] Aside from a few additions, it was mainly bug fixing in this release. The biggest changes happened in the fileinfo extension.

The Windows infrastructure has been moved off on its own with lots of different binaries to choose from. The next version could either be another alpha release or make the jump up to beta - feedback for the aplha2 and the namespacing inclusion will make that determination.