So far, we have witnessed 11 different FCS teams upsetting FBS teams in the first two weeks of 2013, with one team (Georgia State) being the victim twice.

Here is the list of such games for September 14: (those games with upset potential IMO are bolded)
WIU at Minnesota
Fordham at Temple - long shot; Temple lost close to Houston.
Youngstown State at Michigan State
Stony Brook at Buffalo - Buffalo lost big to Baylor, and previously to Ohio State.
Cal Poly at Colorado State - after the humiliation by Fresno State, can the Mustangs rebound by putting the Rams down on the road?
Delaware at Navy
Wagner at Syracuse
Northern Colorado at Wyoming
Bethune-Cookman at Florida International - FIU is inconsistent in football.
Southern Utah at Washington State - quite a long shot because Wazzu upset the Trojan Horses using their defense
Northwestern State at Cincinnati
Nicholls at Louisiana (Lafayette) - can the Colonels roll once again against another FBS team? However, Louisiana lost by 21 to K-State who lost to NDSU.
Eastern Washington at Toledo - OK, the Rockets are 0-2 with losses to Florida and Mizzou... and EWU has enough offense for upset potential.
Lamar at Oklahoma State
Weber State at Utah State