When creating graphics for your website stock agencies like iStockPhoto and Corbis are usually the first place artists go before they start drawing. These agencies have a large selection and will meet all of your legal requirements but sometimes the imagery can be a bit too “conservative” or “canned.” So, when you need to get more creative try exploring image search engines like Snap or Google Image Search. Google has slightly better results but Snap has a cool flash interface. Both of them however will deliver image results that you won’t expect. In fact, the images you will find, although most likely not legally usable for your project, could spark that idea and in turn motivate you to either pick up your digital camera or get creative using Photoshop and purchased stock imagery.