I have developed a little program for entering your game score predictions and keeping track, and then analyzing the results. This began as a programming exercise (testing a new database that's still under development). Thought I'd make it available to NN and see how you like it.
It's rather rudimentary right now, but usable.
Please give it a try at www.adlibdb.com/nfl (cut and paste to url window)
Use a user ID that folks here will recognize.
Your basic score is simply the point differential between your predictions and the actual results.
There is a penalty for picking the wrong winner, and a bonus for predicting the correct score (per team).
After the games are played, you can see how everyone did and who's the winner.
I'd like your comments about what other calculations or measurements to add, or otherwise how to improve the program. I'll look at add picking against the spread.