Thats what drives me nuts about AJAX - its the wrong way to do 90 percent of what people are freaking out over and getting so hyper whatevered over.
http://sportsforum.ws - chat room on top (use IE - chat stuff doesnt need it - if I make a blank white page with nothing on it - it doenst work in Moz cause I made it)
The typing part is sort of hidden under the chat, when your curser is on the bottom of that little chat area you can see it change to like pull down type - pull down
Just script - no refresh - no xmlhttp - no security issues - works (if written by someone else

) - in IE and Moz, no clue nor care on the rest - Also
http://sportsforum.ws/sportsdesk/d7?demo=1 (look on Thursday afternoon when baseball has resumed - nothing happens until then ) - but that is the same thing, different use. Or -
http://sportsforum.ws/NFL/draft?l=80 - everything on that page is done with just script - all realtime, no bs (other than none of them work in Moz - which again is because of my lack of being able to make the Moz gods happy, not the script method I am pointing out)
My scripts probably look like crap, cause I am throwing them up, and on to the next - but they work - and in the case of the chat - I wrote that over two years ago - and still nobody picks up and uses that simple little method.