Verizon's dangled a 4G LTE upgrade carrot in the noses of the Xoom-adopting hordes from the start. Now, it appears the carrier's ready to make good on that promise. Starting tomorrow, current owners of Motorola's Honeycomb tab can visit a dedicated VZW site for a step-by-step guide through the upgrade process. If you were amongst the eager few who signed up for alerts, the company's going to prioritize you and send out a notification v