I heard rumors about Dean chatting up a girl cosplaying as Sam.

HA! Now that would have been funny. And actually there were at least two women dressed up as FBI agents, so one or both would likely have been playing Sam.

Fic where Damian and Barnes meet the Ghostfacers.

Actually, it would be rather interesting to see the Ghostfacers reactions to reading about themselves in Chuck's books.

And yes, it looked like Dean kissing Jo.