Cargo is MUCH easier to get into than any "real" airline like Delta, American, or United. UPS and FedEx have hired over 1500 pilots since 2002, while the other majors have hired less than 100. CAL has been some, but otherwise...its been stagnant.
Also--getting on at FDX is pretty much a cake walk. Look up some threads on the FDX pool and interview process and you'll see they pretty much scoop up about anyone that applies. Ditto UPS... (sarcasm warning light on)