I got a DVD burner myself. Like finegan said, DVD-burners work exactly the same way as CD-burners. The only pain-in-the-ass is that there are not yet any DVD-writing programs out there enabling you to write a Video-DVD. Besides that you need UDF Write Support in your kernel to do so. The site mentioned by finegan is giving some directions on this as well.
I'm able to backup data without a problem to a ISO9660 filesystem, but still have to look into UDF write support so I can write Video-DVDs in the end.

Forgot to say I'm not doing anything illegal ofcourse ...