As the scope of the 7DS project expands, I'm coming up against building more involved 7DS web applications. The search and multicast engines were C programs that produced binary CGI executables, but building more involved community-based web systems is going to be hard. :(
In looking to build the new applications in PHP, I was asked to see if PHP might be supported on Windows Mobile (one of our near-future development platforms) and I found it interesting that Windows Mobile SDK has its own HTTP/web server.
Even more interesting, there have been problems porting the Zend PHP engine to Windows Mobile, so there is an alpha version of a ground-up PHP engine built for Windows Mobile with its own web server.