I've talked about the Twilight book series quite a bit on other boards actually.
I think the books themselves are ok, though clearly not written for a guy like me. But all of my female and gay friends adore the books so they definitely have an audience. I'm actually interested in seeing the movie, if only to see how it translates to the screen (IE: Bella is super boring/annoying, Edward is abnoxiously and unbelievably perfect yet still a huge wuss, whilst his family and bellas 2nd love interest Jacob completely steal the show).
A warning to anyone starting to read the books - AVOID the last book at all costs. It raped almost everything I liked about the book and centered completely around a really obnoxious plot twist/ plot device.