Problem: (stressing the "automatically" in the question title).
I add the hidden network by selecting "other" and entering the SSID. There is no security right now in order to simplify troubleshooting. When the iPod 4 sleeps, goes out of range or the wifi radio is turned off and then on, the iPod will not re-connect to the hidden SSID once within range again. Strange, considering I reset the network configurations before setting up the 1 and only network the iPod 'knows' as well as having installed a configuration profile on the iPod with the wi-fi settings for this hidden SSID. Nothing i try seems to get the iPod to connect automatically. The hidden SSID does appear in the list of networks when I go into wireless settings, but thats not good enough - the iPod needs to connect to the hidden network without any user intervention.
I should mention the router is a cisco aironet 1100 series AP. The AP has 2 SSIDs: the hidden network and a "Guest" network, and it is broadcasting the Guest network. The Subnets are different, in case anyone was wondering. Also, No, i cannot broadcast the hidden SSID; I'm not looking to change the network settings.
The iPod is running iOS 4.1(8B117) and is a 4g model.