Fria Ligan (Free League) got the Alien/Aliens/Alien³/Alien Resurrection/Prometheus license, and are doing an RPG.
The starter kit/cinematic adventure ran pretty well; I won't do a full review here, but if you search RPGGeek.com for Alien Cinematic Starter Kit, you should find my review there.
I've run it, the CSK works really well as a one-shot - hidden agendas, secret traitor, and all.