Hello,
First of all,please allow me to introduce myself. I'm Sargon,a 29 years old web developer with more than 10 years of experience in programming.
If you'll take a quick look at my profile i believe the 5 stars rating out of 250+ projects with a 97% percentage of completed jobs will give you a rough picture about my skills.
A couple of questions regarding your project:
1) How will the customer pay for the advertising package? I assume you'll actually sell these through your OsC site?
2) Can you please post the url of your site so i can see myself what you have so far?
3) Although not explicitly mentioned, i assume you'll also need a sytem - an iframe perhaps - which will be embed on the sites where the ads will be shown - which will actually display the customer's ads?
Thank you for your time,
Sargon