According to an article at DigiTimes, CMC and Ritek have started volume production of 15GB HD DVD-R media and plan to begin production of 30GB HD DVD-R DL discs as early as the 4Q of this year.
CMC Magnetics and Ritek, the top two makers of optical discs, have recently started volume production of 15GB HD-DVD-R SL (high-definition DVD recordable single-sided single-layer) discs and are prepared to begin production of 30GB HD-DVD-R DL (single-sided double-layer) discs in the fourth quarter of this year at the earliest, according to industry sources.
If you'd like to read more, head on over to DigiTimes.