I just configured my first MySQL replication, it is very simple to configure, few configuration steps and it is done.
The hardest thing is to figure the location of MySQL configuration file my.cnf under my FreeBSD, it doesn’t exists by default so you have to create it your self, it can be many place, I choosed /var/db/mysql/my.cnf to make reside with the datafiles.
You can find a sample chapter from Jeremy Zawodny book, High Performance MySQL.

MySQL Replication Sample Chapter (PDF)