Where do you think Google gets all that Gmail space?

Where do you think Google gets all that Gmail space?

1. They've found a way to store email in a black hole.
2. They've tapped into that infinite space behind the fridge and under the rug.
3. Duh, it's just two iPod shuffles per account.
4. They googled for it.
5. They've got all the Gmail accounts hooked up to their Infinite Possibility Drive.
6. Mmmmm, imagine a Beowulf cluster of planet drives!

(from:The Joy of Tech™)