Hi and because a video is worth a thousand words 
I’ve finally got a “working” solution to convert ODP into Blender GameEngine. As shown in the video, this set of scripts will:
- extract text and images from your presentation and convert text as images with Pango/Cairo (provided by pyGTK)
- inject those images in a Blender Template fueled and powered by game engine objects and settings
The last command will finally end up with a final .blend file. Then you can start it with the blenderplayer (at least with Blender 2.4x series).
The next roadmap for this tool will be mainly:
- migrate to Blender 2.5
- handling more ODP stuff (transitions…)
- … and maybe a simple graphical interface
If you want to use/test it, grab the 0.2-alpha-1 version at http://github.com/kiniou/blender-smooth-slides/downloads