Dave Girouard, general manager of Google's enterprise business, was the opening speaker at the 2006 Search Engine Meeting in Boston. He was pitching the new Google enterprise search appliance. (Girouard didn't impress me with what's new and different about the next version of the yellow Google blade. )
I would agree with him when he said: To date, enterprise search is hardly used. Because of this it is very costly, per use, to implement and run. His back-of-the-envelope calculations say each search at a typical large company can cost about $0.25; and enterprise search won't be successful until its orders of magnitude cheaper.
The goal, he said, is to move the search box from the corner of the home page of the corporate intranet to the the center and have it be the main entry point into the enterprise information.