You can transfer files but only to other ipod touch through apps from the itunes store, its not free from last time i checked and i dont think its worth it to buy it.
What i cant wait is when tomtom for iphone will be ported to ipod touch and its bluetooth will support a bluetooth gps reciever.
Maybe you can later through firmware upgrade.
Just like the Ipod Touch, Bluetooth hardware came out before the firmware and you have to buy that firmware. :O