Columnists’ corner: EMC’s recent power efficiency claims may be overstated and have rivals up in arms, but that’s a debate that customers need to hear. Mario Apicella throws down the gauntlet over power and cooling costs and asks for formulas to back up EMC’s claims. Reviews: In Part 2 of his review of the Xserve Xeon, Tom Yager takes a more detailed look at the hardware and says that Apple hasn’t lost its touch for server engineering. Apple’s value-add “is easy to see if you open yourself to the possibility that putting Intel chips in a server needn’t define the boundaries of a server’s capabilities.” If you missed Part 1 of this review, look for it and other discussions of Xserve Xeon in the Enterprise Mac blog. The news beat: In an already crowded blogging market, Six Apart is launching a service for blogging newbies. Vox will even compete with a couple of services from its own company. The global recall of millions of laptop batteries has pushed Sony into an operating loss for Q2 despite a jump in sales. And Cisco continues its summer buying spree with yet another acquisition, this time snapping up mobile telephony software company Orative for $31 million in cash. Technology Industry