SaaS and Web 2.0 and SOA

SaaS is not an overnight concept like any other concept/architecture pattern you see in IT. All these old concepts, change like "old wine in new bottle". With the Web2.0 taking everything into it's sphere, SaaS is one that's going to benefit from it.

With Web 2.0, the users can directly use the portals/applications that are integrated or provisioned using SOA and with Web 2.0 functionalities.