How is it limited? eDVD will let you link from your DVD menus to the internet or any on-disc ROM content (PDFs, Word, PPT, Hi-Def video, Flash etc). You have to do it by linking to a chapter from your menu button (but that chapter can look like your DVD menu so the link appears seamless).
What is the limitation? What are you looking to do?
The feature request has been made before, but there is strength in numbers. The more a feature is requested, the more likely it is to be implemented in a future version (but I by that, I don't mean hitting submit a dozen times ;)...)