Check my blog post for info:

www.capcom-unity.com/jimmyrey/blog/2009/...

Please note on Nov 6th we will be resetting the leaderboards and scoreboards for the title.  The recent release of the Marvel VS Capcom 2 Title Update resolves some gameplay exploits and issues with the calculation of the wins, losses, and ratings.  Due to consumer demand, we will have reset all leaderboard stats to zero.