According to IMDB.com, post-production has begun.
I've also noticed here (
http://talk.hsx.com/films/post.htm?0702155544.notfabio) that a teaser for this film will be screening with Harry Potter 5 and will be part of a combo trailer with 10,000 BC (like Harry Potter 5 and Fred Claus was a combo trailer for Happy Feet). I don't know if it's true or not. If anyone is seeing Harry Potter 5, let me know!