It looks like it's getting to be a new hobby of mine: collecting C++ web application frameworks. After the first one* (a simple HTTP server and session classes) and the modern one (Wt aka witty)**, now the "missing link" was found: the classic Java-like Servlet container implementation in C++! This was made possible by a friendly fellow blogger Eduardo Zea.
Eduado was kind enough to give me a link to the DDJ article describing such an implementation by Rogue Wave named Bobcat***. It's quite old (by SW-industry standards) and the link to evaluation downloads doesn't work anymore, so I think, it didn't quite catch on. But it's another one in my collection! So the actual counters are C++=3, Java=googol.
PS: To be more precise, Bobcat functionality is now part of the Hydra Express****, a Rogue Wave's SOA publishing framework. So are we all going SOAP?
* see: http://ib-krajewski.blogspot.com/2007/09/servlets-in-c.html
** The Wt-framework: http://www.webtoolkit.eu/wt/
*** John Hinke, Implementing C++ Servlet Containers, April 01, 2002: http://www.ddj.com/184405023