Let's say you are playing a game and there is an opening you haven't seen. I play to learn and get better. It would be cool if I could search through the archives of games in this manner: <input black's rating> <input white's rating> <input board set up - i understand you have a special code for this> and pull up a few games that were played with the same beginning. And you could study how each path played out. Better yet if you could just click a button from the board you are on and it shows you a few games with the same opening.
I like this site because it is a good chess learning tool and I think that would be a SUPERB tool.