I only ask this because, yet again, the season 2 DVD set of Stargate Atlantis, once said to be released in January 2007, is now pushed back to March 6, 2007. Crap, I'm not sure if I believe this is a firm date anymore. Sorta like, I'll believe this set is coming out when I have it clutched in my fingers! ;)
But, check out http://www.tvshowsondvd.com/newsitem.cfm?NewsID=6672 for the full details of episodes on each disc (well, the entire 2nd season) plus commentaries. I still don't why they've got SG1 folks doing commentary on SGA episodes. I don't recall SGA actors commenting on SG1.
Anyway, big thanks to the above site for keeping us poor fans informed.