I believe it is a combination of things.

Several endorsements in the past few months have made people aware of this.

Bob Morarity - http://www.321gold.com/editorials/moriarty/moriarty051211.html

Jay Taylor -http://www.webeatthestreet.com/media/archives/AmericanBonanza20100629.mp3

and now - Andrew Cook.

A stock transitioning from explorer to producer had created a very undervalued price.

At this point although I think it is still undervalued it may have gone too far too fast.

I am not selling any yet but I think a pullback should be expected.