I asked this question to Verbatim, Imation and Memorex. Verbatim never replied, Memorex replied and said they have no such plans. And here's Imation reply:
"We expect Imation DVD-R Lightscribe? Discs to be available sometime during the third quarter of 2005. Thank you for your interest in Imation media. I am under the impression that we will but I am not totally sure at this time."
So whatever this means

I hope he is mentioning about DL media as my question asked. And third quarter already passed.