That Sandy Bridge-equipped, "business rugged" Latitude E6420 that Dell debuted earlier this year just got a little more appealing to data fiends always on the go. That particular model can now be loaded with a Verizon LTE card that, as Big Red likes to brag, is up to ten times faster its 3G EV-DO network. You're gonna have to cough up the big bucks to put the DW5800 4G mini-card in your laptop, though. The add-on is $249 and you'll still have to sign up for a data p