This is very similar to Dopplr.com - started in 2007ish and had a bunch of hype but not many people formed a habit of using it. It was acquihired by Nokia. http

This is very similar to Dopplr.com - started in 2007ish and had a bunch of hype but not many people formed a habit of using it. It was acquihired by Nokia. https://en.wikipedia.org/wiki/Dopplr https://en.wikipedia.org/wiki/Dopplr