I saw Scary Movie 3 saturday (And since it was a matine, I only spent 5 bucks) and let me tell you this... It was something that only I would like! If you're extremely weird, go see a matine. If you want to play it safe, rent it later...
All and all, I liked it, but there were a few problems I had with it..
George Carlin and Leslie Neilson needed more screen time.
The Matrix parody (the Orical and Morphious) was too short (things were obviously edited. something on the preview wasn't in the movie, so it seemed too short)
other than that, it was a mindless 80 minutes of pure satirical bliss.
Most of the movies parodied in it (the Ring, 8 Mile, Signs) really deserved the kind of stuff this movie put them through.
And if you hate American Idol as much as me...
SPOILERS
In the 8 Mile Parody, Simon Cowel (ick) makes a short cameo, heckling the freestyle rappers.... he imidiately gets riddled with bullets!!
All and all, a pretty great oddball flick!