Libraries are concerned with quality of information - so is Google, as mentioned in this New Scientist story: http://www.newscientist.com/channel/info-tech/mg18624975.900 (spotted on today's Slashdot). Google plans to rank sources with a patented process used to rank search results.
A quote from the story: "The patent also reveals that the same system could be roped in to rank other search results, not simply news. So sales and services could in the future be listed on the basis of price and the reputation of the company involved."
Something cool to consider - your local library might have the chance to prove its worth against other search services if libraries used this system as well.