Sunday, March 30, 2008 Get information about your IP IP Information 50+ On-demand DNS and network Today's top stories Weekend Edition Breaking news Hot topics TELECOM ECONOMICS Wireless devices create complex billing and security issues; telecom expense management tools can help. NO KIDDING AROUND When his school struggled to keep its network together, student Jon Penn stepped in as manager. SECURITY FOCUS Bret Arsenaul's big concerns are app exploits and virtualization security. Featured video Podcasts Twisted Pair This week: The Motorola breakup, Comcast stops picking on BitTorrent, and imaging what the halftime show of the Hacker Super Bowl would be like. Recent podcasts: Japan's C4I, or Command, Control, Communications, Computing and Intelligence, system on this tank is capable of automatically sharing information with other tanks nearby something like a peer-to-peer network formed between the vehicles.; News; idgns; lanwan; network world; Callpod's Dragon Bluetooth headset works with your mobile phone but can also pair up with a second Dragon unit to create a full-duplex communications channel between two people.; cool_tools; network world; wirelessmobile; Gil Hecht, CEO of Continuity Software, shows where problems in disaster recovery systems can arise and what can be done to guarantee backup systems work when disa...