The Chi*Town Daily News is an online-only newspaper that aims to be hyper-local (a buzzword you hear a lot these days) and welcomes citizen journalism. This interactive map (well, it is on the site)uses the "pin" technique. When you mouse over one of them, there's a pop-up (it's the "alt" tag) that tells you what story is associated with that location. I think that's tremendously helpful. Another map that works this way shows where bloggers who blog about Manhattan (or another borough of New York) live -- very much a neighborhood thing (NYC really is a collection of neighborhoods, no matter how foreign that sounds to those who haven't experienced it). See NYCbloggers.
