Well If you would like help programing the online part I have several ideas. I will not help u though if it is for the contest. I was thinking to make a game with several maps including one training map that you would set up your account, and gives you the basics of gameplay. I was planning though to get a dev team for modeling and all the maps which would be in there own files.
P.S. I think I said to much L.O.L.