The headline says it all, but let me blockquote for you.

Two baseball sources have confirmed that Theo Epstein is on the cusp of leaving his job as general manager of the Red Sox [team stats] to accept a position with the Chicago Cubs that is believed to include powers greater than he has in Boston, with an announcement expected to be made “within the next 24 to 48 hours.”

Now MLB generally doesn't like major announcements right during the playoffs, so I can foresee this stretching until the break between the LCS and World Series. Also, there's still a bit of a hangup.

The hangup in the negotiations has been twofold. One of them is that Red Sox ownership was still hoping to have Epstein remain with the team. The other is compensation: If Epstein is to leave Boston, said one source with knowledge of the negotiations, the Red Sox are going to want “something real.”

That compensation is going to be the real fun part, as I imagine quite a few fans are going to be upset over a quality prospect or player being traded for a "suit". On the other hand, not many "suits" out there with the Theo Epstein's resume. I presume Castro, Cashner and Brett Jackson are the untouchables, past that it's probably pretty fair game. Red Sox fans seem to be happy with the Cubs just taking on Lackey or Crawford's contract and while hardly ideal, neither would terribly upset me. You got to pay something to get something and Epstein is worth the sticker price.

In case that "hangup" becomes a roadblock, Wittenmyer tweets that the Cubs have talked to other GM candidates.