Oh, I think it has value. I was just reporting that I tried it at blekko, and think I completely failed. Maybe you'll be able to do better.
Very interesting! Is the main problem really finding the users or could it be developing an interface that makes it easy enough for users of varying technical abilities to occasionally use?
Why do you feel you failed? Just economics?
Since Greg was CXO at blekko, I would say for whoever is making search engine, its important!