Yahoo! Mindset was a great resource - it was the usual search engine, but with a slider option to allow users to re-rank results into either shopping or research relevance. It wasn't brilliant, but it was a great idea. And now it looks as though it's died a death. I found one recent reference in a blog to it, but nothing else. All the links (including those from Yahoo!) are dead, so I think we can say this is now defunct. Which is a shame.