What do you think of this? http://www.moreofit.com/

It's something I've been working on recently. You give it a URL, and it gives you the most similar websites. You can then filter the results based on tag, and sort between popularity and similarity.

I personally think it blows the competition out of the water... but I'm not so sure how big of a market there is for this type of thing. Business model ideas, anybody?

Thanks for checking it out... and please, provide feedback.