How about adding digital text capability to Vomp?
The RedButton MHEG Engine at http://redbutton.sourceforge.net/ (http://redbutton.sourceforge.net/)
is an active project that allows you to use interactive MHEG
applications.
Maybe this could be incorporated into Vomp?
This might need to work in conjunction with the vdr-mhp plugin
http://www.powarman.de/vdr_plugins.htm (http://www.powarman.de/vdr_plugins.htm)