I tried to search via Google Blogs and found it has disappeared.
I was able to find it in a roundabout way (you can search for it, though already results have begun to disappear) but understand it has been deprecated.
Does anyone know the reason for this decision. It was a hugely valuable tool, with, as far as I can tell, no comparable equal? Does anyone know of any other search service that even approaches it? I feel suddenly like I am in the wild days of the early internet with no decent search engine to guide me.