I used a Nikon D2X which benefited from having the built in intervalometer and ran several time lapses whilst we were on a location shoot in Devon earlier this year. Some bits work better than others but it was a first attempt.
Thanks Andy for letting me hijack your spare D2X :]
Music is by a group called Tycho Track: A Walk.
Check 'em out! I went to see them live at Cargo London having never heard of them. Top stuff, their visuals were great too :]