RSS feeds are definitely web 2.0 think of recently you began hearing about podcasts and RSS feeds....about the same time the term web 2.0 starting becoming common design speak, at leastfor me. I think my major problem was I wasn't designing for people who needed/wanted something as dynamic as web 2.0 so I was stuck in a functionality rut. My head wasn't in the sand so much as I wasn't even standing in the sand box. Luckily its pretty easy to get into and more fun feeling to design. Shiny, bright toys for webpages make light work.