RightScale's paid edition has prebuilt MySQL Master-Slave configurations with or without EBS. EBS is great if your transaction volume is average, but on high IO disks it can get prohibitively expensive. The RS Manager for MySQL has failover, recovery tools as well. All you need to do is plug in your DB dump.
RightScale's Developer Edition is always free - AND -
RightScale Website Edition is FREE for Ycombinator startups while you're actively engaged in the program.
RightScale's Developer Edition is always free - AND - RightScale Website Edition is FREE for Ycombinator startups while you're actively engaged in the program.