GPS for ipod?

Hi,
i have a 2g ipod touch, but really would like to be able to use GPS-nearly bought the iphone just for this feature. However, i have only seen a couple of ways to have GPS on ipod. This iGPS360 module looks ok, but i think you have to have a jailbroken ipod which i dont. If anyone knows differently please let me know! Any other ideas on any other product which give ipod GPS?
Cheers