A most righteous fun X3D avatar app would be a blog comment reader. Conversations with faces. Scan people and build personality stylesheets. Custom per customer.
Shouldn't be that hard. It isn't full MU. It is a player with personality stylesheets for text/audio sequences. Simple really.
Bloggers are pontificators. Commenters are talking. :-) They enjoy it. Up the presentation with cheap tech and they'll use it.
Enable better ponts and more meaningful talks.
US news sites during an election are the perfect situation comedy.