The just released Amazon Q4 2007 earnings report, besides showing that the company doubled profits this quarter, had a couple very interesting notes related to their growing suite of web services. The first is that bandwidth usage from their web services exceeds that of their web sites:
Adoption of Amazon Elastic Compute Cloud (EC2) and Amazon Simple Storage Service (S3) continues to grow. As an indicator of adoption, bandwidth utilized by these services in fourth quarter 2007 was even greater than bandwidth utilized in the same period by all of Amazon.com’s global websites combined.
This is somewhat reminiscent of the point at which Salesforce.com began to process nearly as many transactions via their APIs as through their application proper.
And the second piece of news from that division is that "Over 330,000 developers have registered to use Amazon Web Services (AWS), up more than 30,000 from last quarter." These two details go hand in hand with more developers signed-up and more usage of the core pay-as-you-go infrastructure services.