no, it's not the third GitS movie, as in Mamoru Oshii's directed films like the two i think u are referring to (Ghost In The Shell, Ghost In The Shell: Innocence). rather it's a movie spinoff from the two season series, dubbed Ghost In The Shell: Standalone Complex. it's a parallel universe of sorts, where Motoko Kusanagi didn't get to meet the Puppet Master.
anyway, i bet u will love it. make sure u crank the volume when u watch it cos it has wicked soundtracks. i love Yoko Kanno!
from IGN, the review of another anime film, Tekkon Kinkreet, this time round the director is not a Japanese, but an American (i think), Michael Arias, who is best known in the U.S. as the producer of the Matrix anime spin-off The Animatrix.
Satoshi Kon came out with yet another film - Paprika. go ahead & check out the link to find out more about this fabulous film. i've seen it & i can say that it's an incredible film, just like any other Satoshi Kon's works.
i'll write the review soon. anyway, here is a review from Rotten Tomatoes on Paprika. enjoy!!