Good fruit smoothie/green smoothies recipes?

Hey guys, one of the things I've been finding success with is using a fruit smoothie as one of my meals during the day so that I'm not tempted to fill that space with pizza or a cheeseburger. I was wondering if you guys knew of any good recipes, or any sites with good ones? I'm also curious about green smoothies, as I often do not eat enough veggies in a day.

Thanks