It’s funny, the web 2.0 hype isn’t really over yet and people are already thinking about web 3.0. Well, actually I posted an article from a list apart myself in january (link to posthttp://chaosradio.ccc.de/22c3_m4v_933.html
W3C current work: http://www.w3.org/Style/CSS/current-work
CSS 3.0 stuff from the W3C: http://www.w3.org/Style/CSS/current-work#CSS3
XHTML 2.0: http://www.w3.org/TR/xhtml2/
Javascript 2.0: http://www.mozilla.org/js/language/js20/