In a master-slave setup on MySQL 5.5 on RHEL 6.1, when db replication breaks (for whatever reason), what is a good way to:

• check (and alert) replication is broken?
• get a list of tables that are out of synch across various databases?

I don't have access to server logs, but can query the tables under "mysql" db and "information_schema", in addition to the dbs used by the applications.