Well, I've been promising to get the autobuilds site "alive" for weeks now - finally you can find what you're looking for at http://perisama.net
A brief background on the project. Windows systems do not get much love in open source. Although many projects will compile and work on windows, the work of porting can be a pain. And even ported stuff often doesn't get maintained and the patches needed to compile often don't make it back into the mainstream packages. Also windows users are really rather hampered by Microsoft's "closed off" compiler. You pay or you can't play (unless the project supports MinGW or you want the stripped down free 2005 compiler) And unlike with linux, it is non trivial to set up a useful compile environment (although actually compiling isn't that bad once things are set up)
I started perisama with the simple goal of providing windows snapshots for php-gtk2. From there the idea expanded into providing additional builds for all of php and pecl (and additional cool extensions I've been finding) with several MS compilers (I still don't have a copy of Visual Studio 2003 (MSVC7) - if someone wants to pitch in then I'd have all three versions I could do builds with) in several flavors, including the elusive debug versions. I've been hunting down compile errors in pecl extensions and running after additional external libraries as well, for the simple reason that PHP extensions are cool, PECL is cool, and PHP on windows is useful and fun.