Originally Posted by Angry Jew Cat

I was just at the grocery store today and the girls at the til had one and were talking about it all mind blown. I didn't take a look at it, but I'd never heard of one either. I was curious afterwards.

Found them on Wikipedia with a little searching. Apparently they've been minting them since 2000, not just the one run.

http://en.wikipedia.org/wiki/Sacagawea_dollar