Session 416 is a fansite dedicated to keeping track of all of the known mirrors for the "River Tam Sessions" viral for the upcoming Serenity movie. Serenity feels like the last movie which would benefit from a word of mouth thing like this, seeing as the only people who get what is going on in these shorts are already completely rabid for the movie, but we bow to the superior marketing ability of teh Whedon.

Session416

Previous mention and description of the Session 416 viral here.

See also:
· The international Serenity trailer
·Serenity wow