The things I've been working on for the the past year solve exactly this problem. Mainly, I've been interested in connecting information between various websit

The things I've been working on for the the past year solve exactly this problem. Mainly, I've been interested in connecting information between various websites. A subset of this goal is to cross reference a person to cruchbase, then jump to their site, then view its rankings on Quantcast, Alexa, etc. And, for any URL, I want to find the most similar websites, and repeat the process there. The tools I've come up with are: http://www.moreofit.com http://www.moreofit.com and http://www.dashler.com/toolbar/ http://www.dashler.com/toolbar/ If you find one moderately popular example of something similar to your idea, plug the URL into moreofit.com. It will find you the most mathematically similar websites (based on Delicious tag vectors). There are other advanced options from there that I'll leave to you to figure out. You can use the toolbar to scope out sites with unheard of productivity. That is, open the toolbar on the URL you're scoping out, and use the moreofit.com shortcut to view similar sites. Or you can use the Delicious shortcut to jump to the result on delicious and see how popular it is there. Or you can use the Quantcast/Alexa/etc shortcut to view traffic stats of that domain. Or you can use Backtype/UberVU to see various discussions of that URL. Or you can use the Twitturly shortcut to view tweets that contain that URL. Or you can the Reddit shortcut to view the top submissions from that domain. Or you can search within that website using Google/Bing/etc. Hopefully you'll find these tools helpful. /shamelessplug I've been using these tools for a few months now, and I can tell you that the internet is far more vast than you could ever believe. It's likely something extremely similar to your idea has been implemented, but just never gained traction.