One of my favorite bookstores now has an "Undead" section. This is only one shelf of it, there's actually a lot of undead stuff out there now. I'm not much for the vampire stuff, though I liked Thirsty by M.T. Anderson and I read The Strain because I wanted to see what Guillermo Del Toro would do with the genre. In related news, if you think you can handle it, please watch Pan's Labyrinth.
Personally, I go more for the zombie end of the undead craze. Pride and Prejudice and Zombies was a semi-successful and ultimately pretty entertaining experiment, and I hope it ends up being a gateway for a lot of people to read Pride and Prejudice that might not otherwise. World War Z by Max Brooks gets the award for most committed to its own conceit--even the flap copy and author bio are part of the story. I recently saw a glut of zombie movies, of course Dawn of the Dead and 28 Days Later lived up to everything I've heard. And as a bonus, here's one you've probably never heard of. Sample dialogue (Japanese dubbed to English):
Wife- "There's something wrong. I think it might be zombies."
Husband- "IF IT'S A ZOMBIE I'LL EAT IT!"