If they open a 330 base in ATL the time has to come from some base. With them adding time in DTW on the 330 it would hint that all the time will come out of the SEA base. This of course assumes a 330 base in Atlanta. The company may decide just to keep dead heading people back and forth.

Edit, Forgot we had a 330 base in MSP. Time could come form MSP or SEA. Here is a statement from the company.

We expect this bid to put us in a solid position to support the scheduled 2011 summer flying. We plan to publish our next bid in the second quarter of 2011 to support the proposed fall 2011 flying. It will most likely be a 365 day bid and will include some changes to the A330 and A319/320 basing. We will let you know more as we get closer to that bid.