I needed an appliance that I could deploy, from 1 template, and have the web application connect to a local MySQL(so there is no configuration needed on the application), but use read/write to one MySQL database, a.k.a Multi-Master. Also we wanted to be able to reuse the extra hdd space on each appliance to form a HA storage volume that we could distribute across all nodes and provide redudancy of those files(also can eliminate the need for Samba to share files between appliances).
Below are the installed apps on an Ubuntu 10.04 Turnkey Image:
Result: A single image, that with small configuration changes provides a cluster of Multi-Master MySql servers connected to your web application with clustered storage.
If you have any question feel free to ask.