Hi i found a nice clan module, at
http://www.vwar.de it has lots of features, like clan members, wars, stats, calender etc....
If you look about this webbie
http://www.unrealgamers.co.uk in the Clan Flatlinerz block you will get a better picture of what it can do.
It may not be what your looking for but it looks a great tool for running a clan.