Theory of the Web as One Big Database
Hash Tag Collection
RSS
Rich Site Summary, Really Simple Syndication, RSS 1.0, RSS 2.0, PodCasting are all ways to say have an XML document that lists an index of recent web site additions that can be systematically captured by external sites or services.
RSS is no longer a new technology which has succeeded far beyond where PointCast had could of planned. However, the power RSS has is to begin to seep back into the documents it seeks to index. In other words, well formed web pages can make RSS less necessary. See RESTful architecture to understand the real power of RSS.
