Salesforce.com emerges as the acquirer of buzz-monitoring company Radian6. This appears to be a good match for the future mining of social media big data in support of CRM and enterprise business intelligence. Matthew Ingram runs down the deal, and notes the trend of enterprise software socialization. Some observers wonder at the price, as Salesforce says the acquisition will add $45 million in incremental FY sales. Others see this as competitive with a previous Salesforce investment in Seesmic. But Seesmic feels a lot more consumer-y or small-business-ish, while Radian6 appears more like an enterprise toolset. Seesmic front-ends and plug-ins should complement to the Salesforce offering. Meanwhile, another company in the enterprise social media space, Jive, is beefing up its board. Could an IPO be coming?