iLounge has received more photos supposedly showing cases for upcoming iPod models. As with the case photos discovered last week, these cases are from X-Doria, and offer a glimpse into the shape and features of the fourth-generation iPod touch and a smaller, squarish iPod that could be either the fourth-generation iPod shuffle or sixth-generation iPod nano—notably, it was referred to as the former in our e-mail exchange with the company. These new photos seem to support information published by iLounge last week claiming that the fourth-generation iPod touch will sport a back plate that is mainly flat, as well as a rear-facing camera and mic. We have thus far been unable to confirm whether the rectangular hole on the rear of the shuffle 4G/nano 6G case is for a clip or for access to some other feature. Apple is expected to announce its Fall 2010 iPod lineup at a special event scheduled for Wednesday, Sept 1., at 10:00 a.m. in San Francisco.