Schmap Guides richly annotates online maps to create guides for a big number of travel destinations. They make a nice mashup with existing maps sites and scour flickr for relevant pictures to use (and link to) on their site. A creative-commons licensed picture of mine was found by the editors of Schnap and they asked for permission to include it. (Yes, of course.)
Most of the people whose pictures are featured will probably spread the word. Good marketing!