http://www.sonic.com/products/Professional/eDVD/

eDVD 4 is the "add-anything" to your DVDs tool that makes it easy to include essential enhancements on every DVD you author. With eDVD you can create direct links from your DVD menus to web sites, Hi-Definition Video, High Resolution Stills, MP3s, Flash, Documents, Presentations, Spreadsheets, Executables or virtually any other type of file.

Based on industry-standard InterActual Player technology that has shipped on millions of Hollywood DVDs, eDVD is reliable, robust, and compatible with any DVD authoring program.

Features eDVD version 3 vs version 4:
http://www.sonic.com/products/Professional/eDVD/new.aspx