Comparison of Cloud services is harder than ever. There are at least four major public players and more than two dozen parameters on which a cloud service needs to be evaluated. There are several consultants who’ll probably bill you just to list these, but a lot of this information is available because there are die-hard technologists out there who spread useful information so the general public and fellow-travellers can make more informed decisions. It’s the kind of thinking that’s made open source such a huge hit. A detailed and updated break down of the comparison between AWS, Windows Azure, Rackspace, Google app engine, GoGrid and Force.com has been provided by the COE team at Torry Harris Business Solutions. The services are rated on platforms, languages, integrated DB support, pricing policy, support response time and many other fields.