I was in the RCC at SEA yesterday, and asked what the plans were for merging the UA and CO operations at SEA. The response was that the CO check-in desk will be moved to the UA position at the north end of the terminal in September this year, but the gates will stay as-is until 2013. At some point in 2013 the whole operation will shift to the south end. All the gates will be re-located to Concourse A to join the US operation there. This will place them close to the South Satellite, which houses Asiana and Lufthansa, and hosts the UA international arrivals. I flew out of Concourse A a couple of years ago, and as I recall, it was much nicer than either of the current gate areas.