Best of the blogs: Randally Kennedy has an equation many folks are bound to dislike. Vista + Virtualization = poor performance. “As a veteran IT professional, I would expect to take a hit moving to Vista – just not one that’s so out of whack with the established norms,” he writes. “Clearly, there’s something going on here that makes Vista particularly difficult to virtualize.” Wireless: It might look mighty sexy to your end users, but Apple’s iPhone portends to be the handset IT managers love to hate. “The devices will certainly challenge businesses because of the needed support for e-mail, iTunes songs, and other applications,” reports Computerworld’s Matt Hamblen. Gartner analyst Ken Dulaney explains that his clients “are scared of this device.” Related: Countdown to iPhone, and How to dump your cell phone contract for the iPhone. Security: In this, the third installment in his series about creating a more secure computing ecosystem, Roger Grimes explains the need for laws with a bit of historical perspective. “As a former mohawk-wearing punk rocker, I loved anarchy as an ideal. But I noticed that all my punk friends still called the police when someone hit them or stole their property,” he writes. Nowadays it’s about authenticating and tracking network packets from origin to source, not purple hair. “Any decrease in performance due to the new network crypto mechanics would be more than made up by the decrease in spam and malware that is so pervasive today.” Software Development