As GigaOM reported, Google announced the $625M acquisition of Postini this morning, which was not unforeseen. With Cisco’s $800M acquisition of Ironport (which was hardware-based), Symantec’s $300M acquisition of Brightmail (which channeled its services thru MessageLabs) and Microsoft’s acquisition of FrontBridge (which was service-based) there were only a view acquisition targets remaining in the email [...]