mahalo.com: wikipedia for search
It's a search engine with editor-picked results. It's still in aplha and it may take a couple of years to get to a beta stage. (TechCrunch has all the details).
To me it looks like a wikipedia of search. It could work if Jason manages to attract a critical mass of editors. I'll wait and see. I have the impression that Jason is betting on something else to make this thing work. A browser plugin, integration with some popular service, I don't know. But there must be something.
(And to think that I emailed Jason a couple of days ago saying "I know how to make a better search"! -totaly different approach.)