Google has a challenge on its hands. With lifehacker declaring "Score one, Microsoft" for Live Search's Cashback program over Google Product Search, and Yahoo

Google has a challenge on its hands. With lifehacker declaring "Score one, Microsoft" for Live Search's Cashback program over Google Product Search, and Yahoo! search opening up to developers, I don't recall Google's supremacy being challenged this much in a while. The Yahoo! platform in particular is very exciting.