Sony and Walmart's VUDU introduced a way for VUDU viewers to access some of the special features typically packed onto DVDs and Blu-ray discs. The VUDU Extras+ features will also let viewers clip and share some Sony titles and search dialog and photos from the movies. The extras are also available as a preview before customers buy digital copies of the movies. The first title to include the feature is "District 9," while more are in the pipeline, the companies said. Read more