I think site like that was already available on internet, once when I was using adfly for a link one of my friend suggest me that now we can use shortener link and can earn with bitcoin. I think he suggest me coinurl ! But your one is also a good step we want more opportunities with bitcoin to earn.
that is also a nice place but it is useful to use multiple ad networks/url shortner, so that your visitors do not get bored and with multiple sites you will get more income for your links and your websites.