[4candles]

There is something called "DVD@ccess" for embedding URLs into DVD menus, but I don't know very much about it. It seems to have been invented by a German company (Astarte Gmbh) in 2000, and has been adopted by Apple as a standard feature of its DVD authoring and playing software.

I don't know what PC-based authoring software supports it, but apparently, a DVD authored with DVD@ccess will "enable links on any Windows DVD player". Not quite sure how that can work though.

Dave.