I have been seriously considering using Viraltrafficcoop.com, owned by Darren Olander. According the site, he promotes your website to the best traffic sources that he tests and tracks on a monthly basis. This seems like a great opportunity to get high-quality traffic without having to invest money into many different traffic exchanges, safelists, list-builders, etc.
Has anyone used ViralTrafficCoop.com? I'd like to hear your results.