An interesting rumor making the rounds suggests that Sprint may be leveraging the distribution of Walmart’s 4,200 retail stores to expand its WiMAX footprint. According to the unconfirmed rumor, Sprint would place a WiMAX tower at Walmart locations across the U.S. as a means of easily and inexpensively deploying new towers. No word on whether Walmart is merely giving permission for the towers of is actively investing in the venture. Interestingly enough, the Walmart idea is not new and harkens back to a similar proposal put forth by Bob Cringely six years ago. Is this just an old idea resurfacing as a new rumor or will you really be able to get some WiMAX at Wally World later this year?