As with seemingly all popular XML applications, RSS standard-bearers have splintered into opposing camps. This presents challenges for publishers and aggregators alike. Fortunately, RSS guru Sam Ruby provided a great overview of the landscape recently at Seybold. He concludes that it's not too difficult to understand reconcile the different approaches. He also points to some emerging norms and styles reflective of the various target clients (web browsers vs. RSS readers). A great primer...
Read Ruby's RSS Slideshow