Blockbuster is helping out the launch of HD-DVD titles when it makes them available to renters on April 18th.

In a story from Home Media Retailing, Blockbuster Online subscribers can now add The Last Samurai, Million Dollar Baby, Phantom of the Opera and Serenity "to their rental wish lists."

Doom and Apollo 13 can be added April 25th.

Blockbuster has declared that it's rental format is "agnostic," however the company found that 47% of it's subscribers are "somewhat interested" in the newly formatted HD-DVDs.