Yep, they changed their minds in several letters dated 2008 or later which have been posted to ar15.com... if it's semi auto, 922(r) still applies.
Yes this directly contradicts their opinion letters from the 2005/2006 timeframe.
The real bitch about ATF letters is that they're only ever directly applicable to the person they're addressed to, and the specific situation therein covered, and that means the next letter supercedes all that has gone before, except for the one person the previous letter applied to.
The only rulings the ATF issues which have general and widespread applicability are their occasional official "rulings", which are published on their website and in the ATF FFL newsletters. Those have never addressed 922(r) and NFA that I recall.