Quote "Finally, Focus on Innovation, Not Infrastructure - Force.com is the world’s first Platform as a Service (PaaS), enabling developers to create and deliver any kind of business application, entirely on-demand and without software. It’s a breakthrough new concept that is making companies radically more successful by letting them translate their ideas into deployed applications in record time."
Salesforce.com have done it again! From CRM, to AppExchange, and now Force.com. An entire, Internet standards based open environment for development (IDE) and application server (AS) working at Internet scale. Simply amazing. Every company will want one. Believe.
Strong recommendation to read all about it. http://www.force.com