Dima Rekesh and I wrote an HA-in-the-cloud article that has recently appeared on IBM's DeveloperWorks. Article abstract is below
The new features of the IBM® Cloud enable application developers and architects to eliminate single points of failures in applications. This article provides a detailed guide on those features. It includes a discussion of the approach the IBM Cloud takes (added support for virtual IP addresses); how to prepare your cloud instances to take advantage of this feature; how to set up a highly available website; and how to test that site.