Toward the end of 2007 early 2008 there was a shortage between flight schools, some part 135 single/multi outfits, all the way up to some regional airlines. Trans States was hiring 250h total ME commercial if I remember correctly. I think Comair had a sign on bonus. Some regionals took direct entry CAs. Gojets, Gulfstream, some others I don't remember. Several check hauling companies had to cut capacity since part 135 IFR mins were well above 121 and they could not keep people above 1000h total time. I know Flight Express lost a lot of business during those times.

Even if there will be a shortage, it will never hit the majors. With these oil prices and E190s going to the majors there has to be some significant capacity cuts at the regional level. So it will not even affect the regionals.

That is my guess anyways.