I did it all for the cookie is a jQuery plugin that I put together that sort of mimics bt.com's implementation of their cookie-consent request popup.
This is pretty bare-bones - just the popup in the bottom right of the screen with a Yes/No button that will set a cookie to "yes" or "no" as a starter for ten.<p>Source: https://github.com/poissonpie/I-did-it-all-for-the-cookie<p>Some background for reference:
The UK is implementing new laws which state that websites need to gain consent before storing cookies on user's machines. Previous HN thread discussing the law (which gave me the idea): http://news.ycombinator.com/item?id=3867166