I picked up MegaMind and How to Train Your Dragon, very happy to be able to grab these. Monsters vs Aliens is on my list, but with BB releasing the Shrek films in 3D, Toy Story films, and Harry Potter and Deathly Hallows 1 & 2 all coming out of the next couple weeks, its on the backburner for now.
I recently got around to watching Piranha 3D and while the film is goofy, I thought it was pretty great. I don't think I would like it watching in 2D but there were plenty of cool effects.