Nortel spins off blade server switch businessNortel on Monday announced that it is selling its Blade Server Switch Business Unit to a new company that plans to focus exclusively on building network switches for the fast-growing blade server market. See the full story.Cisco launches security mgmt. platformCisco this week at the RSA Conference is expected to roll out a security management platform that lets users define policies via a graphic interface, then distribute them to network devices that will enforce them. Get all the details.Microsoft shoves BlackBerry with push e-mailMicrosoft this week announced several mobile messaging partnerships and handhelds, with a flock of hardware vendors and network operators. Click here for more.Face-off: Is 'security in the cloud' the way to go?Does security belong "out there" or on your premises? Brad Miller and Bruce Schneier go head-to-head on the issue in this week's Face-off. Read both sides and add your two cents.IBM on the Hot SeatThis week on Network World's Hot Seat, a top IBM researcher reveals new tools for transforming business through IT. Watch the video now.From cattle to chemicals: Colorado school seeks to expand grid computing effortsColorado State University's Patrick Burns could talk about grid computing 'til the cows come home. And in fact, the school's associate vice president for information and instructional technology has used grid computing to help cattle do just that. Click here for more.Compendium: The all-you-can-eat Web 2.0 buffetMark Evans keeps seeing pre-dotbomb over the current crop of Web 2.0 offerings: "Don't get me wrong, I'm loving this Web 2.0 party as much as the next guy. It's like being at an all-you-can-eat buffet where the kitchen keeps bringing out new dishes every five minutes. My only complaint is very few of these services have staying power from a user or financial perspective." See the full commentary.For news updated throughout the day, go to Network World's NetFlash news page.