How can I re-setup an iPad 2? I had one iPad 2 and I got a second one. I want to sync them both to the same iTunes account from the same Macbook Pro. When I plugged in the second iPad it asked me something along the lines of


  This computer has been previously synced with an iPhone or another iOS device


Well, I wanted to share programs and things between them so I thought it would be good to choose "restore" - however that seems to have been the wrong thing to do because iTunes now thinks I have two of the same iPad and won't let them each be customized.

How can I backup to this step where I can have it ask me this question again? (Basically, wipe the second iPad 2 and start over.) I thought about maybe "restoring" it but then I didn't want iTunes to think that my only iPad had been wiped and then wipe the original the next time I connected it.
You can wipe the data and return it to factory settings by choosing settings - General - Reset. 

Like the first answer you should now name them differently.

Just to add to that you will also need to restore one of them to empty, then set it up using iCloud, add iCloud to your other iPad 2 and then they will share data, but you will also be able to add an app to one and delete from the other without losing all data, next time you sync.