hi, i plan on releasing a web service where users can cubmit stuff. but since it may take time to review everything, i was wondering what is the next best ad service to use when im not sure what kind of content will be submited. thanks.
You can try AdBrite or Exoclick. I've recently written reviews on AdBrite inline ads and Exoclick if you want more info. Exoclick is better suited if you have a site with lots of visitors and want quick payout, although it pays less than AdBrite. Better still you can try using both at the same time!