Google: The four trick pony

Hitwise just ran some numbers on the Google's traffic composition in the U.S. Only four properties have significant market share of Google traffic, according to Hitwise, but it's enough to generate a very profitable $16 plus billion in revenue. There are a lot of wide open spaces beyond search, and it's apparent that a Microsoft-Yahoo union could cramp Google outside of search on the outside chance that Microsoft can effectively absorb and leverage Yahoo's assets.