Its not exactly what your looking for, but we used automator to create a launchable application that runs a commandline to export the sql database. We then used crontab to schedule the app to run at certain intervals.
In automator add the "Run Shell Script" action. Set the shell to "/bin/bash" and add the command
/usr/local/mysql/bin/mysqldump --opt -h localhost -uMySQLUSERNAME -pMySQLPASSWORD DatabaseName --single-transaction > "/path/to/export/exportname"
Save the workflow as an application, then use crontab to schedule the application (or you can use Cronnix - GUI for crontab)
This is also a good method beacause you can put the application on the dock and anyone can run the backup on-demand. We have software monitor the folder where we export the databse to and when it detects changes it uploads the new file to our backup server. Works a treat
Not as simple to set up as your probably looking for, but it works well once its set up!