There is support for using FastCGI with Iowa in this release.  It appears to
work fine, but this support is still experimental.

http://enigo.com/projects/iowa/tutorial/getting_started.html has more
information on how to configure your system to use Iowa with FastCGI.

The nutshell, however, is that for best performance, use the
iowa_fcgi_proxy.cgi application.  This is a Ruby FCGI program that will
proxy a request to the Iowa application.  In limited performance tests,
this scheme appears to suffer only a modest performance penalty compared
to the use of the mod_ruby handler.

If you try using Iowa with FCGI, I would appreciate any feedback that you
might have.  khaines@enigo.com