With the current state of the economy/industry people are predicting the cutbacks in flying and you can see it starting with Delta a bit. Upgrade times will most likely go up everywhere. I think American Eagle won't be the only FO trap anymore. Aside from the upgrade time Eagle is a decent company.
I think for those who can choose and live in base it would be a great place to go as long as your not dying to sell your soul to go to a major. You'll definitely be flying, the FO pay is consistent if not slightly above the industry average and again if you can choose to live in base then what is better?