What is the best DVD recording medium?

Hope I don't hijack your thread, but I was curious: can you use a DVD burner to record programs you've saved on a TiVo? You can transfer those programs to a VCR, but obviously transferring the Dolby 5.1 programs or movies directly to a DVD-R would be SO much better! I'm sure there's a preventive mechanism, but wondered if you knew for sure?
Thanks.

I don't see why you can't and in fact Panasonic just came out with a unit that has replay built in.

I don't see why you can't and in fact Panasonic just came out with a unit that has replay built in.

That's good news, I guess, considering all of the copy-protection going on with music recordings. But I can't believe the networks would allow me to record all of the upcoming 6 Feet Under, Season 3, shows on Tivo or Replay, and then burn my own DVD set of the season, when they carefully time and place their own DVD set on the market for premium dollars ($100 list for the upcoming DVD set of Season 2). Are there any types of program material you CANNOT dub onto a DVR recorder like your Panasonic? For instance, can you dub other DVDs? What are you planning to use your Panasonic for? Also, do the DVD-R blanks hold a lot of hours of content?

I am dubbing other DVD's, old video stuff, ect.