I jailbroke my iPod today and I will wayout the advantages and disadvantages:
But first I will explain what jailbreaking does based on exerince and reading:
Jailbreaking: In simple terms alterls the iOS of a device. In more technical terms it removes Apple's restrications and gives the user access to the file system and root.
I jailbroke using Redsn0w and messed up the first time so all I had to do was reboot and try again.
I'd recomend redsn0w for anyone wanting to Jailbreak after reading this guide.
IMPORTENT: When you jailbreak make sure you exit any iTunes application or your iTunes won't work. (To fix this on Win 7, Log out and then log in)
I will also highlight some usefull apps.
= More Custimbility
= More Themes
= More Free Ringtones
= Apps That Didn't Pass The Apple Quality Test
= Funny Tweaks
= Usefull Apps For Accesesories
= Possibility Of Small Lag (only visible if you watch closly)
= Small Posibiltiy Of Virus
= Some False Apps
= Disables SpellChecker
The most usefull app I have at the moment is: Winterboard
If you would like to go back to original iPod software all you have to do is: Plug it into iTunes and click restore, it will probaly update the software. It will then "contact the iPod restore server' all you have to do is leave it.