SOA filling the Gaps

Writing White Papers and Blog posts about Cloud Computing and SaaS is a common phenomenon. I estimate that approximately 30% of the e-mails (not including Spam messages) I receive are about Cloud Computing and/or SaaS. SaaS is not only a buzzword but a real solution which is rapidly going Mainstream.(Read previous posts:    E ven Sap is offering SaaS ERP , Future Applications SaaS or Traditiona l, SaaS is Going Mainstream ). IBM 's acquisition of Cast Iron is another indication  of SaaS importance. IBM is a leading Integration vendor. IBM's integration solutions are branded WebSphere , e.g.  WebSphere Application Server , WebSphere message Broker , WebSphere Process Server , WebSphere MQ etc. IBM's integration solutions address many integration needs and patterns; however it seems that none of them address properly integration of SaaS applications with  Data Center applications as well as integration of a SaaS service in one Cloud with a...