From Travel Skills:
"What’s interesting here is that US Airways, which is merging with American Airlines, is NOT moving into American’s gates in Terminal 2 as we had expected. While that may sound a little messy, it won’t be too bad.
That’s because the airport is now building a new post-security corridor that will connect Boarding Area C with Terminal 2. Opening this December, the new corridor should ease transfers between American and US Airways flights. This is big boost for Delta flyers cooling their heels in the somewhat drab Boarding Area C– they will now have access to all the excellent amenities of T2 that lie behind security."
Are they on track to open this in December? (only connects part of T1 post security to T2 though)
http://travelskills.com/2014/02/03/whats-next-sfo/