For those who have not seen this, check out a feature on Digg called Digg Spy which allows you to see what others are digging and commenting on, all in real time.  I think this is one of the best uses of AJAX I’ve seen so far, in terms of usability… and me being a design guy, its got some cool design elements too (new content fades in the old fades out at the bottom). I did notice these cool design effects do not show up in IE.

Good work by the team at Digg for implementing AJAX in a way it was meant to be used.