the MP3/Music files on the iPod are hidden. Apple does this because they don't want to violate any laws behind piracy and you being able to take your entire library of songs and use the iPod to give away to everyone...and transfer music to the world, etc..
However, there are shareware applications on the web that will allow you to download songs from the iPod to a computer ( as mentioned above ). I have no idea how to transfer to a PS3 but you can do it to a computer and then using another USB device - like a USB Keydrive, etc.. to possibly move them to the PS3 if that's what you want to do. Also, I assume that the PS3 will read CDR's, so you may want to burn CDRs and transfer that way if the PS3 will allow you to copy files to it's HD. I don't have a PS3 so I don't know how to make it happen.
do a GOOGLE search for "ipod to computer" and the 1st hit will be a free app to take songs off any ipod and put them on your computer.
good luck!