With all the talk of other conventions going on, we've not really heard much about PAX Prime. There will be gaming there. I've seen Randall from Catalyst talk a bit about it on their Facebook page. Flying Frog Productions will also be there, and they'll have some pre-releases for Shadows of Brimstone along with them.
The new products they'll have with them are Caverns of Cynder, Doorways into Darkness, Colonial Horror, and some new Shadows of Brimstone Enemy Packs. You can also get demos of Shadows of Brimstone, Last Night on Earth, Dark Gothic, Fortune and Glory, and several of their games.