Future iPods: On Air Purchase from the iTunes Store?

According to VNU Net, the new iPods to be released in couple of hours would support Wi-Fi, making it possible to listen to webradios as well as accessing the iTunes Store to purchase tracks.
This would imply a deeper revision of the iPod, as it requires advanced OS, and it could confirm that the new iPod will be nothing less than an telephone-less iPhone, same display, same multitouch interface, same OS, similar hardware. Current rumors concerning the iPod nano reports a reduced iPod nano, the display and the click wheel being as close as possible, competing with the Shuffle for the small size factor.