I've recompiled my apache 1.3.4 installation with mod_usertrack.c, and have set my cookies to expire in 30 minutes.

mod_usertrack uses its own cookies to track user movement across your site. It doesn't affect how cookies are used in other applications.

With this set, I still recieve cookies from the server set to expire 3 hours after the start of my session. Is there a configuration option I'm missing within mailman itself?

I assume that you mean the mailman cookies and not the mod_usertrack cookies? If so, you can change the value of the cookie life with

ADMIN_COOKIE_LIFE

in $prefix/Mailman/mm_cfg.py. The default is

ADMIN_COOKIE_LIFE = 60 * 60 * 3 # 3 hours

Chris