The Neil Gaiman Audio Contest at Bookperk.com had a leaderboard, but it was rarely updated. I wrote a simple script that tried to look at every contestant's page once an hour and read the number of votes they had.
You can see the final standings, or grab all of the historical data (tab separated) to load into a spreadsheet or do analysis on it.
I've created these charts from that data by importing it into Google Docs. There's more data than Google Docs can import (there's a 256 column limit), so this is not the full picture.
Questions and comments can be directed to aneel at loath dot org
Since this is hard to read because of all of the lines, here they are, broken out by 5s...