I originally saw this on CrunchNotes as a way the comment streams go on TechCrunch. I think this is how most comment streams go on most sites these days.
This is brought to you by the fine folks of CollegeHumor.com. Warning: There is language and innuendo in the video.
http://www.collegehumor.com/moogaloop/moogaloop.swf?clip_id=1771556&fullscreen=1
Mile High Soapbox 