Today the 7th May 2009, one month past the launch of geShout, I have launched a service on top of geShout to allow Twitter users use Google Earth to share locations and landmarks.
I used Twitter API and Google Earth API with my knowledge in PHP to build that.
What remains is to use oAuth and let Twitter approve my application. So twitter can identify the source. example: about 1 hour f.
This would be the first attempt to integrate Twitter with Google Earth.
Let me know your comments and suggestions.