Thanks to Daily Kos, some friends and I at Dave's Election Atlas have been able to start putting together the 2012 Presidential Election b/congressional district map. Take a look:
And we've nearly completed the swing map as well:
Very interesting stuff! We look forward to seeing how NY-2 turned out, as well as a couple districts in New Jersey that were close last time around (NJ-3 and NJ-5).
EDIT: Here's the 2008 Presidential Election by 2012 districts (thanks again to Daily Kos), for comparison: