are you determined to use Windows/.NET based software? We are currently
working on a collaboration platform based on well-known OSS tools like
moinmoin (wiki), svn, Bugzilla (bugtracking) and other components as
they are required (blog, forum, mailinglists). We aim to build a system
similar to trac, but with much more powerful components. This esp. holds
true for the bugtracker and wiki.  It was one of the main reasons, not
to use trac.  We too have a timeline and try to integrate the separate
components as tight as possible (though we will not reach the level of
integration of trac in the near future). The software stack is linux
based to ease hosting and adminsitration. So if linux/unix is a
show-stopper for you, don't read further... :)