Tech & You Columnist Steve Wildstrom says that on July 1, Federal Communication Commission regulations 11 years in the making will liberate consumers from the tyranny of cable providers' set-top boxes. The new rules prohibit cable operators from combining tuning and security in a single integrated device. The CableCARD security module should lead to the creation of whole new classes of cable-ready devices. Consumers should finally get the boxes they want, not the ones the cable companies wants them to have