I've added a link on the downloads page for a VC6 build of the driver
(
http://cloud.github.com/downloads/mongodb/mongo-php-driver/mongo-v0.9.3-r2-php5.3-VC6.zip,
I've also changed the naming scheme, it was getting a little
ridiculous).
I actually asked some Microsoft PHP people about this at OSCON, and
they said that the guy who wrote the warnings about VC6 was being
paranoid. Apparently VC9+Apache will work fine. It's only a problem
if Apache allocates some memory, passes it to PHP, and PHP deallocates
it, which Apache is VERY careful not to do.
Also: they said that there are binaries in the 5.2 branch haven't been
recompiled since '99, so there are security holes and memory leaks out
the wazoo. They think that everyone using PHP on Windows should
upgrade to 5.3.