These connectors are available as Release Candidate #1. They have been tested against both MariaDB and MySQL databases. I would like to have a few more people see if these work as well as they have so far been described.
Unless I hear from someone with a reason why it does not work as it should within the next week, I will be upgrading these to final release.
This is the URL:
http://extensions.libreoffice.org/extension-center/mysql-native-connector/