Just watched this - it's a hell of a movie. The way the parts come together, it really reminds me of Magnolia. The difference is that I thought Magnolia sucked, and this was great. Definitely buying it when it hits DVD.
Also, if anyone is letting themselves be put off from this by Ludacris, stop. He gives a really good performance; it's not your standard "famous rapper dude in a movie" role.