Metadata based application design

Have been instrumental in designing & developing metadata based enterprise applications. Now that SaaS & PaaS services are being offered by major vendors we are moving away from traditional product development models.Given the cost advantage along with the application infrastructure maintenance benefits I feel cloud computing is here to stay, so enterprise on demand is a reality.From CRM, Email, to hosted data services like Amazon s3 building a product offering seems like a click away, which I think will boost greater innovation & bring more competitive vendors in the market giving cost advantage to clients. So 3 cheers to metadata & multi tenant platforms, I feel the multi tenant should extend to multi technology so that 1 is not bound by the platform limitations, though the integration seems open ended via web services & xml the end user should have a choice to deploy the app using PaaS while choosing the technology he wants. that way he has the option to keep his product development both in sync on & off PaaS/SaaS frameworks.
Contact me if you are looking for a Web Services & metadata expert on vshintre@definee.com