I hope you don't mind me posting this here especially if you already have your own prediction game but there is a new Football Conference Prediction League available to play in. This is in addition to the Conference North and Conference South games which have been running for a number of seasons. There's also one for the F.A. Trophy.
They can be found at
http://www.nlpl.co.uk/PredictionLeague2/index.phpPit your wits against other football fans and see how well you do. There is no entry fee. Select the league you want to play in from the "ID" drop-down menu at the top of the page and either log-in if you have played before or register as a new user and enter your match score forecasts.