Lately I’ve seen various specs show up that seem to look promising and could potentially be the future of the web (some of these items have been evolving for a while but aren’t necessarily mainstream yet):
source: http://www.w3.org/2006/rwc/Activity.html
source: http://www.w3.org/2008/webapps/
I could seriously spend days reading through stuff on the w3c site, there’s TONS of information there.