Keep networking. Most corporate jobs (especially the GOOD ones) are never posted to the internet. Instead they are filled by word of mouth and personal recommendations.

This site doesn't have a bunch of corporate pilots on it (relatively speaking). I'd suggest that you find one that does and get to know the members there. Also keep a networking file of folks you meet (online or in person). Keep in touch with them (Periodic email/phone/christmas card/etc)! You never know when they might know of an opening.