TUAW notes that Apple has posted a set of documents providing developers with information for creating and distributing iTunes LPs and iTunes Extras, bonus interactive material for music and video content available through the company's iTunes Store.
According to Apple, an automated, electronic system for submitting iTunes LPs and Extras will be rolled out early next year, but until that time, developers will have to manually submit their content to Apple under a limited program.
Automatic, electronic submission of your iTunes LP or Extra is scheduled for the first quarter of 2010. Until then, the submission process is manual and limited. Please contact your label or studio rep for details and consideration. An existing iTunes contract is required. Your iTunes LP or iTunes Extras will be reviewed by the iTunes team for appropriateness of content and for technical quality.
Apple stated last month after some confusion arose regarding financial requirements for record labels looking to release iTunes LP content that it would be releasing tools to assist developers in creating their own content "soon", but no additional information was made available until now.