I saw a mod like this over on another forum: http://dystopia-game.com/forum/index.php
and I could really use a mod like this for my own forums, its for a top100 list, I run a modification that gets ranked on this top100 and we have alot of forum members that would get a kick out of being able to vote right from the forums, and keep track of how many votes they've entered.
You can see the mod by visiting a topic on these forums here:
Maybe you can get an idea of how it works, this would be a very popular mod for people who are into making game modifications. Maybe you could make it so that the person could enter any kind of top100 site to vote on, etc.
I could really use this kind of mod tho, so if your interested in making it that would be great!