They're RSS feeds. The general term I've seen to describe things that generate RSS are "scrapers", which may or may not be related to the P2P term of the same name. Things that gather things.
Or perhaps, as you say, RSS is just a nice little vore fantasy, things being fed and eaten everywhere...
I like my RSS client (I suppose it's technically an aggregator
though. It can access LJ entries and everything else, and it's mostly not annoying in the slightest.