Evilboy - what's the timeline here? You obviously completed the interview, got the conditional job offer letter, did the sim then did the drug test. At that point, did you get a call offering you the position and THEN they took back the offer? Or did you get the thanks but no thanks letter in the mail? VERY DIFFERENT SCENARIOS. Read the conditional letter one more time... the job is conditional pending the SIM, drug test, background checks and final review. Lots of opportunity to still not get the job.
Others - no conspiracy against Comair folks. There have been Comair folks all week. Just don't show up acting like WE OWE you the job at Mesaba. I suggest a humble, confident and positive attitude. Be honest, straightforward and genuine. That will get you far. Oh yea, tell them you know a few things about flying too.