You've all heard about it by now, so I'll just supply you with a detailed link, and pretty much leave it at that.
I don't really have anything to say, except that it must suck to be a San Francisco fan right now; honestly, I can't imagine having to deal with this kind of thing happening to my favorite team. Barry Bonds is the Giants. I'm guessing there are going to be a lot of people in the Bay Area questioning their allegiance. But maybe I'm underestimating their loyalty. Who knows.
The real winners here are Mark Fainaru-Wada and Lance Williams, co-authors of Game of Shadows - not only is this book going to fly off the shelves, but it also lends itself to sequel after sequel. I can't wait for the Ryan Franklin version to come out. If anyone was taking cattle steroids...