I was surfing around over on You Tube (the most addictive site ever) and did a search for Dark Shadows, which pulled up several pages of results! There are some clips from the show (including the scene where Willie unleashes Barnabas from his tomb inadvertently) as well as lots of tribute/montage video clips! You can check them out for yourself here:

http://www.youtube.com/results?search=dark+shadows&search_type=search_videos

Enjoy!!!

:)

YouTube has entire episodes of "Dark Shadows", too.