Compass has been discussed multiple times here. Just do a search on them and you will find the threads.

Slated to begin ops in April of this year. 76 seat EMB175s, openings to be filled by NWA mainline furloughs, then off the street. Separate seniority list from mainline.

Of course, this is all subject to change. NWA is in the process of trying to acquire Mesaba. I think things will be more clear after next week when the reorginization plans are filed in Bankruptcy court.