Unconcered,
Just to clarify the "SuperDrive"; it's Apple's word for "DVD Re-writer". The Combo Drive in the 1.83 GHz MacBook will read CDs & DVDs and write CDs. The SuperDrive will read CDs & DVDs and write CDs & DVDs.
As for copying DVDs (of uncopyrighted material, of course
), you wouldn't be able to do this on the 1.83GHz. Equally, you wouldn't be able to back up files onto a (higher capacity) DVD, but you could onto a CD. As I said earlier, it also means that you will be unable to burn from iDVD unless you can attach an external DVD burner (such as a LaCie).
AppleMacster