Here's our current site: http://blippy.com
Here's a good write-up of what Blippy is all about: http://www.techcrunch.com/2009/12/11/blippy/
The big question that Blippy answers is 'What are your friends buying?'. The key to this question is simplicity. And despite being a concept that you have to think about the ramifications of, Blippy is perhaps even more simple because it employs “passive sharing.” Again, you aren’t explicitly sharing anything via something like a message, your actions (buying things with your credit card) are being automatically pushed to the web.
Blippy provides transparency into normal everyday things. This actually fits in perfectly with something Twitter CEO Evan Williams recently tweeted: “Many of the great businesses of the next decade will be about making information about our behaviors more visible.” That is exactly what Blippy is doing.
Because the actual purchase prices are made visible, there are other interesting dynamics. For example, imagine being able to tell if you’re getting ripped off with what you’re paying for a gym membership or on your Comcast bill when compared to what your friends are spending on the same things.