Photos or drawings converted into vector graphics look really cool. However, manually converting a rasterized file to a vectorized file takes a really long time. If you’d like to automate the vectorizing process, however, visit VectorMagic, a Web site hosted by Stanford where you can vectorize anything. No guarantee on how awesome the results will be, but, if you choose a rasterized image with a low number of artifacts and a relatively narrow palette, you should get stupendous and scalable results.
Below is an example. It is a picture of Will, made on “logo without artifacts,” “medium palette,” “medium quality” settings. I like the harsher, more chiseled look that vectorization supplies. The original picture is right here.