Are double-sided burnable DVD's available to the public yet?

I’ve never really seen any advertised anywhere. Are there?

Note: Not double-layered, doube-sided. Just to clear up confusion. I’m talking about having a DVD that is burnable with 4.7gb on each side.

Here’s some

And here’s a discussion of them at the VideoHelp forums

During this month the first dual layer DVDr (8.5GB) is gonna be released in Japan, and in the rest of the world 1 month later. Produced by Mitsubishi Kagaku Media and will be sold as Verbatim an Philips on the market. The disc cost about 11 euro and can be played on ordinary dvd players. Besides Philips burners there also gonna be some new ones from Sony (DRU-700A en DRX-700UL).

Hmm… Good info. And thanks for the link above!