Web 채팅 관련 사이트, 코멧, Comet

o 구현된 사이트
http://wwwm.meebo.com/

http://www.lingr.com/
http://www.zdnet.co.kr/news/internet/entertainment/0,39031275,39151799,00.htm


o 코멧
http://en.wikipedia.org/wiki/Comet_(programming)
http://ajaxian.com/archives/comet-a-new-approach-to-ajax-applications
http://www.pushlets.com/