The DVD market, despite a steady downturn over the past five years, is still estimated to net $24 billion annually.
Of porn companies releasing in the next-generation formats, CD Girls is the only to have released in Blu-ray, while Vivid has been promising a Blu-Ray version of Debbie Does Dallas...Again for more than six months (the standard-def version is available). Wicked and Digital Playground have both committed to HD-DVD.
The above paragraph is moot in terms of consumers getting Blu-ray porn at their neighborhood Blockbuster; the company doesn't carry hardcore and is often accused of censoring its softcore titles. Only if Jenna Haze wore an Operation Rescue t-shirt (rather than a CD Girls t-shirt) whilst being hot-oiled might the Viacom property permit it.
None of the major online DVD distributors have a Blu-Ray/HD-DVD section yet. "There aren't enough titles to support the shelf space," a rep for Gamelink said.
Previously: Who-ray came first?; "Porn flatters itself," sniffs Blu-ray; Tabling Blu-ray, embracing HD-DVD (fleshbot); Wicked decides on HD-DVD
See also: CDGirls, Vivid, Blockbuster, Blockbuster - Blu-Ray All the Way (forbes.com)