I've been mucking about with maps for a while, for work and for some other sites. I also put together a prototype of a book tour map that people could add events to. You can see it here. It's not really finished and I'm not sure if I'll get around to finishing it. The events won't persist so you can't send links to people and if you leave the page they'll probably disappear. It's just a little test really.
If anyone is interested in the code I can send it, I might even get around to putting it on github. It uses AngularJS as I'm cool like that.
Obviously if it doesn't work you have to remember that it's just a test!