The one feature I have been wanting on the iPod Touch, well the iPad too, is GPS. Location based services are hot right now and will continue to grow. TUAW has a write up for getting GPS functionality on the Touch. No it’s not built-in and hidden. No it won’t work unless you jailbreak the device. It requires a paid program purchased through Cydia called roqyBluetooth which is $11. You will also need a bluetooth GPS device which they provided a link to one for $20.
It’s going to take a little work and a little money but if you really want GPS on the iPod Touch you can make it happen. I’m just glad there are others interested in GPS on the iPod Touch. Maybe Apple will listen and add it to a new release.