Moral of the story, check it out at least monthly for some good stuff. Right now they're giving away Already Dead by Charlie Huston.
In December, Suvudu has been running a series of contests where one book is being given away on a daily basis, you just have to sign up for every book you're interested in. That way they're hoping to make sure everyone gets a fair chance for the books they actually want.
This month, Pat at fantasyhotlist.blogspot.com has been doing some amazing giveaways as well. He's asked publishers to put together packages of books to give away on his site. Definitely check this out too (even though I know this is ruining my chances). :)
One more thing. This is just a shout-out to my friend Tyson who's got a great blog going at stateofreview.blogspot.com. There are already some nice reviews on some pretty cool (and not so cool) books that you should check out (or not).