We watched an anime called Summer Wars last night.
I rather liked it. No spoilers, but it involved a large online virtual world, lots of avatars, a bit of cryptography, computer hacking, and an artificial intelligence/robotics professor from Carnegie Mellon.
Interesting, as I went to Carnegie Mellon, studied engineering with a focus on robotics, work in the robotics institute there, went on to work in the security and cryptography group at Microsoft, and currently work as an engineering manager for a rather large online virtual world with lots of avatars.