Well, let's start with the obvious: the Iowa Caucuses matter in various ways that I've been talking about all week. Also, the bounce Santorum is getting (or perhaps not getting -- he flattened out in one poll today) out if Iowa will determine whether this thing is over real quickly or whether it will be contested for a while.
Syria, again. Here's a question: other than within Iraq, how important should we think the events there are right now? Yemen was in the news too this week, and Egypt.
A fairly good jobs report continues the string of better US economic numbers, which matters both economically and politically, of course.
And the recess appointments matter -- for substantive reasons in the affected agencies, and because of the precedents involved.
What else? What do you think mattered this week?