Need Advise on Twitter/Google Maps mashup like

There’s a very cool Twitter and Google Maps mashup site in Japan, called (

And if possible I’d like to clone the code (which is not available for download). I especially like the idea of showing Twitter user avatars with their locations, but I have no skills to write this from scratch.

If anybody can tell me what types of Twitter APIs are being used on this site, and as well as Google Maps APIs, it would help me a lot. OTOH, I’m also asking the site developer for reference.