We currently use Illustrator to create and edit stock vectors to use in our online training courses as well as print media. It is being used by the training department as well as the marketing department, and that's it. The business problem it addresses is the need for graphic creation and editing to provide visually pleasing assets to be used in our online training as well as ads and print media. I mainly use it to edit existing vectors I download from stock image sites. But other members of my department do more graphic creation within Illustrator.