looking for someone on the net ? you can start searching for faces not only names using more than one search engine which provides this feature.
Google image search:click on advanced image search link near the search button and choose faces in content types.
Windows Live image Search:do a normal search then choose Face in the menu at the right that will filter the results.
there are also search engines that provide face search as its main function like www.facesearch.com which has a nice interface.
another one is PolarRose where you can sign in and start naming people.
hope that information was useful.