I just released a simple plugin that I use to backup and restore databases instead of using a mysql dump.
File structure will look like that:
I use this plugin to backup my apps running in production. When I need to debug an application, I just need to restore the db locally and debug. The fact that it uses fixtures helps me finding data quickly and I can easily decide to only restore few tables.
I also have a Capistrano recipe to create backups before each deployment.
oohh and the plugin is Sake compatible, give it a try :)