I'm not sure how many people participated in your contest, I would think that all of those would have voted.
Getting the other visitors that venture into the forums to vote for a winner for your contest may prove a difficult task.
As an example look at how many people vote on the weekly polls, surely not anywhere near a reasonable percent of the visitors for the period.
It may well be that we are more of a community here then one would think. Unfortunatley the point I'm trying to make is not a good one. In other words, people always want things within the community but are unwilling for whatever reason to help make them happen. Good Luck, and yes I voted.