Okay, so: I have an iTouch 2G jailbroken via blackra1n and I want to UNjailbreak.

[Occulus]

It's running OS 3.1.2 at the moment, I think.

Do I just do an official iTunes restore, or do I need to specifically "un-jailbreak" it somehow before I restore?

Also, apart from some few apps on the App Store, Cydia, and Rock, do the new features of OS4 justify this action (I hear we can do themes in the official OS now, for example), or should I leave it jailbroken and continue to enjoy things like Fontswap and Winterboard?

[comtec]

1. do an official update

or better, just go into settings and reset the unit to factory.

I have a 2G 8gb touch, and i just suffer with the hit on performances.

[Occulus]

2. I'm seriously considering it, but

things like SBSettings (and all my emulators, like NES4iPhone and MAME4ALL) are really making me think twice.

I'll be jailbreaking again when OS4 gets hacked, of course. I'm only concerned about how long a wait that will be...