With copyrights issues looming over its YouTube unit's effort to pair search with video, Google may be more vulnerable to a challenge by portals Yahoo! and MSN -- which have their own content, as well as search -- than previously thought, according to Mark Simon of search engine marketing firm Did-it. "It seems that Web 2.0 favors media companies, and can wreak havoc on search-focused ones," he writes. "That's good news for Yahoo, but spells real challenges ahead for Google."

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