Movie....
There isn't much known about the movie, however, it IS known that Miramax has bought the rights to make the movies and the Amulet of Samarkand script is in the talks. I got this from the Russian Bartimaeus Trilogy official site, so I'd say this information might have a grain of truth in it.

Movie Petition
A petition to make a Bartimaeus Trilogy movie, if they need more encouragement!