Intent driven search by Yahoo is in Beta, you can preview it here:
http://mindset.research.yahoo.com/
An excerpt for the beta home page explains "applies a new twist on search that uses machine learning technology to give you a choice: View Yahoo! Search results sorted according to whether they are more commercial or more informationalapplies a new twist on search that uses machine learning technology to give you a choice: View Yahoo! Search results sorted according to whether they are more commercial or more informational"
Well I guess they're not sleeping after all and serch for terms related to our client sites shows this search to be very promising.
John