Speaking of JFK, apparently, plans for Delta's T2/T3/T4 are becoming more concrete now. There will be additional T4 gate usage as they start tearing down and rebuilding T3.

By summer 2010, they will have connecting walkways between T1 (AF, AZ) and T2 (DL), as well as between T3 (DL) and T4 (DL, NW, OK, KL), similar to the one currently between T3 and T2. The goal is to have easy access to all DL and DL codeshare flights (since CDG and AMS are now exclusively being operated by AF and KL respectively) under one roof, so to speak.

Rebuild is supposed to be done by mid-2012.