There's nearly two years worth of archived postings to this list at: http://lists.freebsd.org/pipermail/freebsd-questions/ which you can browse through. You can guess how to find the archives for the other FreeBSD lists...
Older messages can be found at http://docs.freebsd.org/mail/ but it's not such a nice interface. A good trick with Google is to search for: site:freebsd.org "your topic of interest" :which will find all matching pages on any freebsd.org site -- most of which are mailing list messages.