SmartBoard Help!

I need help yet again! This year I was lucky enough recieve a Smartboard for my classroom. I love this piece of technology and use it every day, but I'm stuck on how to use it as a center. I've seen it used as a center where kids play a phonics game. I really want to start using it like this, but I have no idea where to start. Please, please, please share if you have a smartboard and let the kids use it. How do you use it? Where do you get the activities to use on it??