In San Francisco for JavaOne. The Monday before JavaOne is CommunityOne, Sun's push for Open stuff.
Not surprisingly, the operative word is Cloud. Virtual everything running in Sun's Cloud. They have the data center virtualized from CPU through Storage and Networking. Their big push here is compatability with other cloud infrastructure via an OpenAPI initiative. They are also shooting for compatibility with existing cloud technology such as the S3 and WebDAV protocols for storage.
The main idea that was pushed at the key note was you can set up and end-to-end data center just by logging on to the Sun Cloud site and submitting your credit card information and buying the capacity you need.