From the session description:
Cloud computing is self-serve outsourcing for web companies. Clouds give even the smallest startup access to world-class infrastructure that can grow as needed. And developers build apps faster, because they start with the building blocks of online applications: Authentication, storage, messaging, and the social graph.
Can’t get into specifics on panelists yet, but they’re good; April’s session on databases of the future brought together senior folks from Microsoft, MySQL, and Amazon SimpleDB.