Who says piracy doesn't pay? According to DigiTimes, media manufacturers are seeing an increased demand for DVD+R/-R DL discs. This increase is due in part to a hack for the Xbox 360 which allows for the playback of pirated games.
Sources at Taiwan optical disc makers makers indicated demand has been warming up for DVD+R/-R DL (single-sided double-layer) discs recently, following the increased availability of a modding hack that allows for the playing of pirated games on Xbox 360 consoles.

According to various media reports, the hacked games need to be burned onto a dual-layer DVD using a special process before they can be played.
The article also mentions that global shipments of DVD+R/-R DL discs are expected to reach 100 million in 2006 and should double in 2007. If you'd like to read more, head on over to DigiTimes.