Love this plugin. I run a football forum, and the predictor adds a whole new dimension to it.
One small request: would it be possible to change the 'joker' so it is allowed once per submission from the user? (in other words, once every week of the league fixtures). Some have used their joker without realising it is a one-shot thing, and I think it would make the league (Scottish Premiership in my case) predictions more interesting.
Keep up the good work!