First, I would like to thank you for this guide. I didn't know the new jailbreak has been released so now I can upgrade to 4.0 and re-jailbreak
So I guess it's a good topic (At least for some.) Elsewhere it's rather disappointing. This jailbreak is so easy to use almost anyone could figure it out without a guide. You needed to take this to the next level and make it more imaginative.
Format wise it looks reasonable, pictures where they're needed, etc but definitely from for improvement. The green font for example, is a little unappealing.
In the information aspect it's not too great. As I said above its so easy you could basically have just given a link to the jailbreak. Hahanerd mentioned suggesting some things to do once Cydia is put on your iPod (Such as Winterboard, Appsync, etc.) Or even a short "How-too" guide on restoring your iPod if you don't want the jailbreak (I know you said it was aimed at people who already know about jailbreaking but every little bit of information helps.