Viral ads are the hottest thing in advertising right now (see examples here and here). They try to spark your interest, so that you spread the site/idea/product around to a friend, like you would a disease (like how I caught this cold!). One reader, Mike Sutter, discovered a blog called "Honey for Tango" which focuses on a girl's encounter with the paranormal. This could haven been a convincing, and interesting viral blog, but unfortunately, it seems like the reveal happened too soon: her latest entry over-enthusiastically hypes the upcoming Dungeon Siege: Throne of Agony.
The game itself looks interesting, but her obviously fictional blog does a poor job of getting me excited about the game. Also, I understand the game is releasing on Halloween, but in my opinion, the blog's focus on the supernatural doesn't seem to mesh well with the fantasy environment of the game.