June has come and gone with nary a sign of One Laptop Per Child's first consumer-facing device. Granted, we spent some time with the final version of the XO Tablet during an Engadget Show shoot back in mid-May, so it seems like the Vivitar-designed slate may not be too far off, after all. Yesterday, the company quietly announced that the slate will get a July 16th Walmart-exclusive launch -- a date that will find the d
