OpenLayers Open Source Maps

So some guy who looks like he was 16 just gave a presentation that was better than Microsoft, Garmin, Platial, and many more. He was talking about OpenLayers, an open source javascript mapping engine. It's one of those "I want to go sell hot dogs" moments. Now I'm going to have to go figure out what this is and what it can do. I'm scare to think it's something I may feel compelled to learn and use in some sort of way -- just to make my life more complete. Maybe I should just quit and sell hot dogs. I think mustard will be my thing. I'll have 12 different kinds of mustard, some home made. Yah, that could work.