Hello, I am new to this list and I don't know about older discussions.
So I ask you: is it interesting for you, to change Wikipedia from PHP to a C-written engine?
I just in development (most is ready) of a high-performance, high-security tool, usable for Wikis, CMS or forums. It is Open-Source (GPL). The sources are not available at the moment, because I make changes every day. But it need only some weeks... I created two libraries to make a forum-platform-application: libstd3000c and libcpcgic. The application can use fastCGI and communicate with Apache as an daemon (FastCGIExternalServer).
I'm writing C-Code since 1987, C++ since 1990 and PHP since many years too. I switch back to C with modern methods, using objects, encapsulated data, multithreading and internationalization. Sophisticated string methods avoid buffer overflows and consequently use of C-classes make memory management easy. And, and, and...
Manfred