I stopped by SoundClick today and after noodling around a bit I found that SoundClick has charts where the list the top played songs. My song was #52 out of 9,162 in the Classic Rock genre and #551 out of 163,605 in Rock..
Songs are rated by the first play from any unique internet address. So, if you play it 20 times, and someone else in your house plays it 10 times.. Only the first play counts.
You can see the current ratings here.