I found a website that makes pin maps. I've been curious to see where everyone is from as well as the distribution around the country. I didn't take much time to figure out how it works, so I hope it's self-explanatory! You should be able to add a "simple" or "detailed" marker (your call) under the Additions menu drop-down. Be as anonymous as you like, or not; I think you can just add by zip or by city name. Try it!