iOS devices do not have a mount point because the computer does not treat them as data drives. Instead, data is sent through usbmuxd, which connects directly through USB. There is a library called libimobiledevice which uses the information reverse engineered by the jailbreaking community to allow you to communicate with iDevices (It doesn't require a jailbreak unless you want full filesystem access, the jailbreakers were just the ones motivated to do the reverse engineering). According to their homepage, you will also need libgpod to sync music/videos.
If when you say "iPod" you mean non-iOS iPods and not the iPod touch, then they are mounted as normal hard drives. They will show up on your desktop if you use disk mode or turn on the option in iTunes, and can be accessed through the command line otherwise.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…