There was an excellent documentary that was posted on the boards a while ago... When I walk... I think was the title. Of course it really gave the story of PPMS so depending on which type you have it could appear to be more of a horror flick than representative of your circumstances.

But still it did an excellent job at covering the nature of the disease, the uncertainty of how quickly one might succumb, the various 'treatments' and occasional cruelty of hope. It was extremely well done, and I would highly recommend it for people that are curious about the disease.