I like the idea of Citrix Dazzle. Citrix is taking the approach with applications that they can be subscribed to by end users from any device from anywhere and still have a secure connection. According to Citrix, Dazzle is:

• A self-service “Application Store” for corporate employees
• A simple store front for applications published by Citrix XenApp
• A familiar interface for end users to install applications for use with little or no training. The feel is like adding Acrobat Reader or some other web application
• Free (2H09)

Citrix Dazzle

Cloud computing won’t just all of a sudden be adopted by organizations; but this approach does fit in with building a core that enables clouds eventually.