I use the web heavily in my games. In my starwars game that ended about a year ago, the website had news updates and time line updates that simulated news events. Ideally, I'd update it randomly. Reality forced a single update between games, however. Regardless, all the players would quickly check to see what else was happening in the universe while they were in hyperspace: http://sw.angband.org
My homebrew world game which is still under construction ( and will probably forever be given the scope I'm aiming for ) isn't as successful at web integration. I'm aiming for more of a book feel for it. I find the timeline or recent history sections still get used frequently. It helps a great deal for heroes to know they aren't operating in a vaccuum, and that the Empress that killed off one of their clans is up to more tricks elsewhere in the empire. http://www.farne.org
My homebrew world game which is still under construction ( and will probably forever be given the scope I'm aiming for ) isn't as successful at web integration. I'm aiming for more of a book feel for it. I find the timeline or recent history sections still get used frequently. It helps a great deal for heroes to know they aren't operating in a vaccuum, and that the Empress that killed off one of their clans is up to more tricks elsewhere in the empire. http://www.farne.org