I think Battlelog (http://battlelog.battlefield.com/bf3/gate/), Battlefields community, running on real time framework Planet (http://www.planetframework.com/) is a good example on how real time web apps should be built. Client side rendering, live updating surfaces via "WebSockets". Nice to see this getting more coverage, I think it is a knowledge web developers must learn to master, or at least learn best practices for real time patterns. Interesting times indeed.