From InformationWeek:
Big tech companies bought hundreds of smaller players from 2000 to 2009, but to my mind only one acquisition stands out as the smartest purchase of the aughts.
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My pick is EMC/VMware, because of the sheer impact that server virtualization is having on the technology industry. And because VMware currently owns this market, it gets credit for much of this impact.
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As for EMC, the company gained a relevance and market power it would never have commanded as a plain old storage vendor. On the flip side, Microsoft, IBM, Oracle and others have the knives out for EMC/VMware like never before.
Full blog post here.