This one question contains much of the necessary wisdom around mysql and SSL certificates. Incredibly helpful.
Good introduction on setting up mysql replication with SSL encryption. Some of the options have changed in mysql 5.5 (no moremaster-connect-retry) and some settings are not applicable to Ubuntu, but the gist of it is useful.
Simple script to monitor mysql replication delay. It updates a value on the master every second and checks how far behind the value is on the slave. Simple yet effective.
Clever approach to monitoring mysql replication with monit. Ruby script checks replication is running and then touches a file, monit in turn monitors that file's timestamp and if it gets out of date, sends an alert. Sort of like a dead man switch. Clever.