Story I heard was that they had a falling out with Craig Spegel, from whom they licensed the boot grip design. I hope this is nothing permanent, but if you look at their website, they no longer list individual models for different handguns (you apparently can order grips, but they're not listed by gun type - I wonder what they would do if somebody actually placed an order). It's very possible that S&W had stockpile a large quantity of these grips and is still working through their inventory.
Laura,
Which Pachys were you considering? There were 4 different models listed on the Pachmayr homepage. I have the most experience with the Decelerator grips (which came on 2 of my revovlers) and the Compac. Their Compac professional looks pretty promising, though. In all cases, I could do without the Pachmayr logo.