Yeah, the article includes SaaS as cloud computing. The SaaS portability problem has been around for years. Cloud computing as I think of it-- AWS, Mosso, etc

Yeah, the article includes SaaS as cloud computing. The SaaS portability problem has been around for years. Cloud computing as I think of it-- AWS, Mosso, etc-- is generally built on familiar and open technologies. If anything it is easier than ever to redeploy an application with a different cloud provider...and vendors like CloudKick and RightScale make switching trivial.