It’s been a while, but now there is a new version of the MySQLBackup script.
This version (1.42) has a few enhancements and some configuration options were added.
The main new feature is that it now supports multiple dumps per day and database checks. The old backups will be removed, of course, but only when they are over a day old.
An added configuration option is that it’s now possible to choose whether you want the databases locked during the backup.
Have fun with it. It’s in the Downloads section.