Use whatever search engine you want, and you'll find buzz about the monumental Microsoft-Yahoo deal. The two giants are teaming up to take on Google, so radical changes are in store for advertisers and marketers, not to mention you consumers who will be blitzkrieged.

In the 10-year deal, Bing will be the search engine, and Yahoo will sell the ads next to the search results. (IT World has lots of details on the deal.)

Those millions of faithful Yahoo searchers? A whole lot of them are going to switch to Google. The market isn't exactly patting Yahoo on the back. The search company fell 11 percent.

Good background of the pact from AdAge.

The implications are less clear than just the fact that Bing will be the search engine sent to the front to battle Google. This is all assuming that the Department of Justice OK's the deal. (Wisconsin senator Herb Kohl, who chairs the Senate's trustbusting subcommittee, is already calling for "careful scrutiny.")

Microsoft's Steve Baler, naturally, is warning that Google will try to stop the deal with intensive lobbying of regulators.

As for the implications, some onlookers call it a shortsighted move: They argue that when one search brand is folded into another, the acquiring brand loses market share. That's what one Michael Martinez argues here: "Now searchers will have to choose between Microsoft and Google, and if the past is any indicator of what those people will do, they will move to Google rather than to Microsoft (who took away their favorite search tool)."

Google's a formidable foe, currently holding 63.2 percent of U.S. search queries, but MicroHoo faces bigger problems in Europe. Ad-buyers over there are up for it because it means competition for their euros, but Google is more dominant in Europe, holding about 84 percent of UK searches.