I was just saying that if they gave it as an option then I would go with additional internal space over a DVD drive... I can never have too much drive space. I believe that the Air is Apple's idea of the perfect laptop and the MacBooks are in transition to that format.
Not to mention we a are at the point where you can carry a large library of home movies and photos around for editing and various projects all on the laptop. First the processors of laptops caught up to where this was manageable but the internal storage was too small for a large video collection (+ itunes library + iphoto + other). Now we are getting into 750GB (or 1TB if you don't mind a slower drive) sized drives and its all contained. You just need an external for backup.