Steven is talking about some of the ideas that Microsoft is working on for data interchange – like taking a contact from an address book and past it into a web page – they call this live clipboard, created with scripts on a page.
Steven also talks about the Simple Sharing Extensions for Atom and RSS, that allows bi-directional data synchronization using feeds. This depends on having well-defined formats for data, like vCard and iCalendar.
Oren Sreebny 