Continental and United are planning to merge. This could be ugly for regionals.
The following regionals fly for Continental:
Expressjet (the largest)
The following regionals fly for United:
Skywest (the largest)
That's a lot of regionals. United has far more regionals than Continental. Once they merge there could be a shake down and whipshawing. I also suspect bases/domiciles to be closed/adjusted (up or down). When Delta and Northwest merged regionals were moved around quite a bit. Continental and United don't have major bases close to each other...well Cleveland and Chicago. Hmmm...it will be interesting.