Ilia Alshanetsky has this new post about the release of PHP 5.1.0RC3 to the public.

Those of you monitoring the PHP development mailing list probably know that I've taken over from Andi as far as PHP 5.1 Release Management. Today I am happy to announce the second (yes, I know its RC3) release candidate of PHP 5.1.0 is out and available for testing. You can grab the source snapshots from here: http://downloads.php.net/ilia/

As usual, the more testing done on it, the better - they're only really looking at "real-life" issues now, taking care of most of the major issues from previous release candidates. So, if you have some time ot want to help out, head on over and grab the latest download and get out there and test!