I just stumbled upon it the other day. It's a variant of the google search engine for, well, scholars I guess, still in the beta stage.
For those of you who are looking for science info or are researching facts for papers or presentations, this looks like a dream. I'm not sure what exactly it does, maybe it confines the search to university sites, but I entered a few random search strings and it came up surprisingly free of useless "BUY ELECTRODYNAMICS ON EBAY AND SAVE THREE PERCENT" type of links.
Has anyone used this before? Or has everyone been using it for ages and I'm only the last one on the intarweb to find it, as usual?