They will fill the regional flying needs of whatever carrier swoops in to pick up the scraps if United fails. They have the ability to switch brand loyalties, you do not.
And that would probably be southwest and they have no express carrier. Every carrier out there is trying to get rid of 50 seat RJs, I know you have 70 seat RJ's but don't exprect to many carriers to try and bring in 366 aircraft to fill the void, these are fragile times and carriers are a bit gunshy on expansion, besides isn't Delta cancelling a lot of express contracts? Why do you think the express guys are immune to the downturn in our industry? Is it because we pay for your fuel?