http://trailers.apple.com/trailers/universal/skyline/
The latest trailer is available there. I just watched it yesterday, and I think it's the same one that was shown during football today.
A completely independent movie, but with big FX - pretty interesting reading about the movie. The people who made it independently from big studios, actual own a famous FX house.. when it was basically finished, Universal was all "we like."
I guess the shooting locations were very, very minimal, and the shooting itself was quite low budget.. a lot of it was shot in an apartment. And of course, basically a cheap cast.
But I want to see it none the less - the idea of the Sirens concept being turned around as invading aliens (who like the way we taste)... quite intriguing. Probably end up waiting for the BD release.