Apparently this is a 2006 British-made miniseries that finally was released straight to DVD in the U.S. Wiki entry here
Steely Gaze
tried to get some of the animated movie adaptations, but haven't managed to yet.
ozoneocean
His later books are far too preachy and formulaic for my tastes
Nerfherder
If you do a hunt on youtube, you'll find the trailers for the forthcoming live action "The Colour of Magic", starring David Jason, Sean Astin, Tim Curry, Jeremy Irons and Christopher Lee back as the voice of Death.
It airs in the UK right now, and will soon air in the US on Ion Channel.