We sat down with Katarina Skoberne at the Essential Mediatech conference in London to talk about OpenAd.net . OpenAd.net is an online marketplace for buying and selling advertising, marketing and design ideas . It allows advertisers to leverage OpenAd's 9,000 professional members who can anonymously compete for projects leading to lower cost and higher quality work. OpenAd.net is a great example of leveraging the Internet and crowdsourcing to optimize a real-world problem.