http://hddvd.highdefdigest.com/news/show/Easter_Eggs/First_High-Def_Easter_Eggs_Reported/260
"From the Serenity HD-DVD's main menu, highlight 'Extras' and then press LEFT twice on the remote. This will bring up a hidden Serenity logo, which will take you to the 'Fruity Oaty Good Time' featurette."
The 90 second featurette was also included as an easter egg on the standard DVD release.
In fairness, this is not the first easter egg content to be discovered in a high-def disc release -- some studios have opted to "un-hide" content that was previously offered as standard DVD easter egg content, making such content directly accessible from the menu of high-def discs, while Sony has included monitor calibration test patterns as "easter eggs" on all of their Blu-ray releases thus far.
"From the Serenity HD-DVD's main menu, highlight 'Extras' and then press LEFT twice on the remote. This will bring up a hidden Serenity logo, which will take you to the 'Fruity Oaty Good Time' featurette."
The 90 second featurette was also included as an easter egg on the standard DVD release.
In fairness, this is not the first easter egg content to be discovered in a high-def disc release -- some studios have opted to "un-hide" content that was previously offered as standard DVD easter egg content, making such content directly accessible from the menu of high-def discs, while Sony has included monitor calibration test patterns as "easter eggs" on all of their Blu-ray releases thus far.