Does all your stuff get deleted when you jailbreak your ipod
Theres a chance it can yes. I have had it happen to me but it doesn't happen every time so there is a small risk. best of luck!
Once you jailbreak your iPod, not all the applications are lost. A number of default applications like the calendar and mails will disappear, but you can always get them back. Just use iTunes on your computer return your iPod to its original state.