Verizon tonight was caught distributing a memo to retail staff encouraging them to sell to iPad customers. The note obtained by Engadget encourages floor workers to promote the idea of using a Wi-Fi only iPad with a Novatel MiFi router. Mixing the two would not only save the $130 premium on an iPad with built-in 3G but would help users get off of AT&T;'s "overloaded network with limited coverage," according to the memo.The strategy is slightly unusual as it ignores the actual cost of service. To achieve an instant bargain over the 3G iPad, a MiFi requires both $50 and a two-year contrac...