No.
Jailbreak
If you jailbreak correctly, no, you keep all your songs on your ipod after jailbreaking.
download them from loads of sites as usual, you dont need to jailbreak just to get free music
How to jailbreak my iPod touch
to jailbreak your iPod 4.1 go to greenpois0n.com
mmm by listening to the music from youtube... for the rest you need a computer
No. Your jailbreak will remain as it is. Syncing your iPod does not alter the jailbreak in any way.
Free games, apps, music, and you can change the background and app style
to jailbreak your ipod 4.1 go to greenpois0n.com
No but you can jailbreak an iphone or ipod touch but they each have different sites to jailbreak your ipod/iphone
no sadly you cannot jailbreak ipod nano's you can only jailbreak ipod touch, iphone, and ipad.