Can the iOS 6 setup assistant be re-run a second time without erasing my iPhone? After upgrading my 3GS to iOS 6, I had to make an urgent phone call. Thus, when the iOS 6 setup wizard showed, I just hit "skip", "continue", and "accept" whenever possible.

Now that the phone call is made and I have time to spare, I'd like to go through the setup again. Is it possible to restart the setup wizard (without having to restore my device and reinstall iOS 6)?

If this is not possible, which settings should I check and which steps should I take to make sure everything is set up correctly?
If I recall correctly - perhaps others can help flesh out any missing details - the setup wizard primarily lets you sign in with / sign up for an Apple ID to use for iCloud, it asks you to agree to the iCloud Terms of Service, and it asks about setting up Location Services.

All of these can be accessed directly through the Settings app at any time. I don't believe you will miss any important functionality by missing the wizard, especially if you were previously using your iPhone with iCloud in iOS5.