Help! SG1 canon question

[dragojustine]

Because I am still only halfway through SG1 Season 7, but I need to skip ahead to research a fic, I appeal to the collective flist wisdom: When exactly does Jack leave the SGC? I mean, it's during the Season8-season9 break, I know. But do we ever see him tell the team this decision, or see their initial reactions to it? If so, WHAT EPISODE? If not, what do we know about this?

I need this. *begs*

ETA: Found! My flist rocks. Thank you.