AT&T to buy BellSouth in $67 billion dealAT&T Sunday announced a deal to acquire BellSouth in an all-stock deal valued at $67 billion. Click here for more.VoIP vendors get serious about SIPVoIP vendors poised to make news at VoiceCon this week say they will deliver on the multimedia and interoperability promises of Session Initiation Protocol with a lineup of products that use the protocol as a core IP PBX technology. Get the full story.What makes Harvard's net tickHarvard's data network supports 125,000-plus users, its Border Gateway Complex routes about a half-million IP addresses and the network carts around 150T to 200TB of data per day. Jay Tumas, who oversees the operations center at the heart of the network, recently gave Executive News Editor Bob Brown a peek behind the scenes. Read the full interview.E-mail volume expected to explodeAs the size of individual messages and in-boxes balloon, e-mail systems are choking under the strain. E-mail archiving software, caching appliances and download services can help get the mail delivered. Click here for more.Shutdown avoided as BlackBerry dispute is settledResearch In Motion and NTP have settled their long-standing legal battle, with RIM paying NTP $612.5 million to settle all of NTP's patent claims against it. Click here for more.Today on Layer 8, where we've got an Oscar hangover:We provide more evidence for why one shouldn't use convenience store microwaves; give tribute to the Oscars with the short film \u201cMySpace: The Movie\u201d; see how well our Layer 8 moviegoers did in Best Picture voting; and unveil our latest caption contest winner. All that and more at your home for not-just-networking news.For news updated throughout the day, go to Network World's NetFlash news page.