Update (26 Feb 2012): New builds with working php_intl extension compiled against latest version of ICU (18.104.22.168).
Update (10 Mar 2012): You can now download php5apache2_4.dll (for Apache 2.4) from here.
PHP 5.3.10 was released on February 2, 2012 to provide a critical security fix.
Here are the 64 bit thread safe and non thread safe binaries for Windows. A usual, they have been compiled with Visual C++ 2008 (VC9). Also, I have compiled them against latest versions of OpenSSL (1.0.0g) and zlib (1.2.6).
VC9 x64 Thread Safe
VC9 x64 Non Thread Safe
Additional extensions can be found here – http://www.mediafire.com/php-win64-extensions.
Currently the following extensions are available – APC, dbase, eAccelerator, geoip, http, memcache, mongo, OAuth, printer, ssh2, suhosin and win32service.