The F/A is correct - the first A320 is scheduled for delivery in February of 2008. I'm not sure that you can assume the F/A has first hand knowledge of what routes they're going to be placed on. There are other equally important domestic routes, such as DEN-LGA (red eye excluded), that could use the extra pax capability. Additionally, with F9's admitted focus on increasing their international biz, you may see these planes flying South of the border.

Now if we can just get some A321s ordered...