There has been a lot of recent attention to the use of ATOM-style event feeds over HTTP as a method of integration.  Instead of maintaining a live service to expose those feeds, it is often acceptable to use old-style scheduled batch processing to create and publish feed files.  When combined with cloud technology like Amazon's S3 file storage and hypermedia linking, this can create a highly available, yet simple and testable solution.  Our teams have started to call this old-meets-new approach 'Hipster batch'.