I think it varies, there are some guys that end up in Texas, others fly in the Northeast. There is a lot of movement and expansion right now in the company, so chances are that you will get a base of your choice within a short period of time. I just saw a guy with a seniority of 390, which is the double of what it was less than a year ago.
One thing to know is that girl in Flying Corporal's avitar is NOT a colgan flight attendent. The situation in the avitar may be realistic though depending on which base you get. Again, sometimes when working at colgan you can't tell if you are working for a 121 carrier, or if you are on tour with Poison and Motley Crue. On occasion, after training you get some time off because they have no checkairman for you right away.