Interesting, I didn't think about it that way. It popped into my head because I was burning a bunch of my unused documents off of my computer, and I used 6 DVD discs, but if I had dual layer, it would have only taken 3 discs.
What about Blu-Ray and HD-DVD for storage? Do you guys think those will take off. I read that they'll be able to store around 50GB per disc. Wow! That would be amazing, especially if the price was reasonable. Let's say I can get 4.7GB DVD discs right now for about $0.20-0.50 per disc. I would definitely pay up to $5 per disc for 50GB.