Thought of updating, few questions

[sOwL]

Hello. I have an ipod touch 2G, jailbroken with redsn0w (version 0.7 if i remember well) and i've been very happy with it. Recently some apps refused to sync because they required a newer version of the OS (im currently running version 3.0). This is probably due to lazy developers most of the times, because seeing these apps working on a friends iphone i figured that no function they have needs the 3.1.2 update... meh anyway. So, first question, should i wait for version 4.0 or do you think its still going to take a while until its released? Now onto my main concerns.. Let's say i decide to update to 3.1.2, what is a good way (if there's any) to backup just everything on the ipod? I mean, applications and music etc can be backed up on the iTunes, but what about all the jailbreak stuff? there's an app called APT backup which keeps a list of the cydia apps you downloaded and downloads them again after a restore. But what about all the settings etc, is there an actual way of easily restoring whatever you've put on the device?