It is pretty senior.. expect 2-8 months in PHL or DCA.

This is the rundown for January 2008:
Base / Junior FO DOH
DEN / 6-18-07
PIT / 8-27-07
DCA / 10-29-07
PHL / 10-29-07
IND / 10-29-07

That make Denver the most senior FO base for January, followed by PIT