I found my answer, decided to post the results in case anyone else runs into the same issue.

I indeed have a manual link cable from the knob controlling the vents to the flap that opens the airflow to the windshield. The cable had popped off.

I removed the glove compartment to view the cable and the flap door, but the problem was right behind the knob itself.

http://i11.photobucket.com/albums/a1...LooseKnob1.jpg

http://i11.photobucket.com/albums/a1...GloveView1.jpg

http://i11.photobucket.com/albums/a1...pflaplink1.jpg

Forgot to explain the fix.....

The easy and first place to look, is behind the vent control knob. You can pry out the control panel using a panel removal tool. Carefully of course.

The cost was $0.