http://www.wired.com/politics/law/news/2004/10/65309
""In a world in which you can embed your message in a pixel on a picture on a home page about tea cozies, I don't know whether if you're any better if you think chat would be any particular magnet," Jonathan Zittrain, an Internet scholar at Harvard Law School."
he is, of course, wrong. hiding your message in a pixel on a picture is all very well, but sometimes you actually want to carry out a conversation.
...not to mention it would be an interesting project...