Home Runs and Steroids: This guy's no Amateur: Art De Vany puts my recent column on the topic to shame and makes an even stronger conclusion: "Forty years of home run hitting in nearly 12,000 major league hitter years of chances have produced no change in annual home run production. The statistical law of home runs that held forty years ago still holds today. It follows that steroid use either is not wide-spread among MLB players or it is ineffective in increasing home run power." (via Transition Game)
Disclaimer: lots and lots of stats. You've been warned!