I have released a plugin I have had for a while. I'm not sure why I never got around to releasing it. Its a very simple FarCry plugin that gives you the ability to create a one question poll and display it on the site. It uses a couple content types and a rule.
To install, copy the files to /farcry/plugins/spcPoll and add "spcPoll" to your "this.plugins" setting in your FarCry constructor. Deploy the content types in the COAPI manager and restart the application. You can now create a question, assign answers to it, and deploy that question using the "Poll: Display Poll" rule.
Let me know what you think!