All iPods including touch/iPhone have the same firmware for all regions. [...] There is a part of flash that is never erased. It stores the serial number and region etc...
Tman, thank you! So, you are saying that the volume-cap setting is stored as well in the flash memory part that is never erased. So, can I go ahead and update my US iPod safely to 2.0.1 without risking I colume-cap that as well?