Salesforce launched 15 years ago. With annual revenues expected at more than $5 billion this year, it is hard to remember those days when Salesforce was a scrappy start up, trying to sell enterprise customers on the benefits of the multi-tenant software-as-a-service model. That battle is long over, and since then Salesforce has gone on to introduce a number of other new innovations that were also promptly snapped up with the rest of the industry. Chatter comes to mind; so does its latest product, Community Cloud.