Josh at Giveaway Scout introduced me to their site, and I thought it was pretty interesting. They scan thousands of blogs to bring out all the blog giveaways in one spot. They also post sweepstakes and contests. If you are bored and want to enter tons of blog giveaways, check them out here.
If you are a blogger, you can also submit your giveaways for them to post your giveaway on their site.