== Technical jargons == 

 This is all very confusing. I think we need to have a clear difference b/w Cloud computing, grid computing, clustering, multi-tenant, software as a service etc...  Some times these terms are self contradictory.?  —Preceding comment was added at   

 : I agree and have spent the last days improving the situation (multitenancy is a key characteristic of cloud computing and SaaS a subset), but there could still afford to be some clarity in terms of differentiating the other terms (esp grid/clustering).