Welcome to the Net's New Battleground: Mobile Software

As the war for Internet supremacy goes mobile, the world's biggest tech companies are jockeying for position. And the battle lines are clear at the Mobile World Congress in Barcelona, Spain, where nearly every wireless combatant is in attendance. Google (GOOG), Microsoft (MSFT), Intel (INTC), Nokia (NOK), Verizon (VZ) and others are vying to unplug computing from your desktop machine, disconnect media from your home entertainment system -- and make Web-based content available to you anywhere.