Perhaps as a consequence of the seemingly iterative nature of the improvements, Apple has for the first time made this full iOS upgrade free to all of its iPod touch customers, rather than charging the customary $10 fee that provoked groans in the past. Many users will be thrilled—particularly some of the iPod touch owners who held off on versions 2.0 or 3.0 in protest over the charges. But as a disappointing aside, iOS 4.0 is the first version…
