Interesting slides from Tom Coates of PlasticBag on The Future of Web Apps.
Look to add value to the Aggregate Web of dataREST-based web services ("readable, reliable and hackable URLs" + "Build for normal users, developers and machines") form a sort of lightweighted (RDF-free) semantic web.
Build for normal users, developers and machines
Start designing with data, not with pages
Identify your first order objects and make them addressable
Use readable, reliable and hackable URLs
Correlate with external identifier schemes
Build list views and batch manipulation interfaces
Create parallel data services using standards
Make your data as discoverable as possible