Service notification
How does a service consumer become aware of new services? Standards inititiatives, most notably UDDI, work on a polling model, where the consumer searches the registry for services of interest. The parallels here with browsing are obvious - in the early days of the web I would have to periodically visit a site to see if it had anything of of interest. With RSS/ATOM the content now comes to me. IBM's
James Snell shows how the same approach can be applied to service notification, in this case using ATOM.