Meebo, a popular web-based chat service, has announced that it is going to extend its successful advertising platform to include the growing number of partners that are deploying its Community IM product, which launched last year. Last summer Meebo launched interactive social ads on its main chat portal at meebo.com, presenting users with small icons at the bottom of their chat windows that would display a popup when clicked (users can also share the ads they especially like with their friends).