CMC and Ritek have reportedly started production of 18x DVD+R and DVD-R media. Unfortunately, the the discs are currently being produced in limited volumes and are expected to fall well short of demand.
Although several leading global brands have already launched or will soon offer 18x DVD burners, CMC Magnetics and Ritek, Taiwan's top two makers of optical discs, currently produce 18x DVD+R/-R discs only in limited volumes and the supply may fall significantly short of global demand, according to industry sources...
...However, the global supply of 18x DVD+R/-R discs appear to be lagging, the sources pointed out. CMC and Ritek are able to immediately start volume production of 18x DVD+R/-R discs as long as the market demand is large enough, the two companies said.
The article also points out that due to high prices, 18x media is not expected to become popular until 2007. If you'd like to read more, head on over to DigiTimes.