9to5mac claims to have knowledge of the upcoming full-size iPod which they are refering to as the "iPod Touch".
According to the site, the OS X based iPod will share a similar look to the current iPhone, complete with "home" button and a 480x320 pixel screen. Compared to the iPhone, the outer ridge is said to be black, with a slightly thicker case.
A report from earlier today from Appleinsider does expect up to 4 new iPod models to be introduced in September.