Im honestly not sure why DL keeps buying CRJ's... AA and UAL are buying Ejets left and right, pax love em, and they are less restrictive to certain airports...a CRJ will always be a CRJ no matter how long the tube is...[/QUOTE]

Ok think about this....in the US Airways system there are a lot of the Ejets. However they are not better and here's why. There are NO EJETS handled by PDT ground services, AKA Express terminals at any hubs. They are all handled at mainline gates with mainline ground folks. And that IS NOT cheaper than pulling up on express ramp and dropping the air stair door. And it takes ONE belt loader, couple guys. Ejet is two belt loaders, and a scissor truck to cater. CRJ needs a golf cart. And if you think that it costs the same to have a crew of PDT Express ground people compared to mainline you are wrong. So just that point alone is enough reason why these airlines keep buying the CRJ product. And this goes for all three majors. Who wants to give up gate space at LGA or ORD when you can stack CRJs five deep and drop the steps. And all three majors have regional ground ops for the Express Connection Eagle end of things for a reason.

As far as undisclosed orders are concerned. No public company can secretly order airplanes with publicly traded funds WITHOUT disclosing what they are buying.....SEC frowns on hiding billion dollar spending.
So chances are its overseas. or a private US airline.