I've been a journalist for 15 years. Prior to that I'd volunteer to keep stats with the big book. I enjoy it in a sick kind of way -- football, baseball and basketball. I also do some PHP and HTML scripting.
I can't believe Scout and the predecessors dropped the ball on this. With all their development power, they got very greedy and forgot to just make systems which work well.
I've thought of a similar venture. I only suggest that you get a system that works as well as paper and pencil, then you offer premium packages for detailed reports and live analysis.
I look forward to seeing the outcome of your project. Best of luck!