What is it used for? What are the pros and cons? Can you revert?
I just got one and I heard you can jailbrake it. Thanks!
Used for: Installing other software/mods - XBMC, weather, etc
Pros: ^^
Cons: Time consuming, slows it down a bit, can make it unstable, updates are a lot of effort
You can JB it if it's a 2nd gen. 3rd gen you can't.