As a result of the Sony/MGM deal that Comcast was a part of there are now Free Movies (don't require subscription to HBO/SHO etc) and also some older MGM Series OnDemand.
MGM TV Series OnDemand (OnDemand -> Cable Favorites -> Tube Time is the path):
Maude - First 6 episodes.
Barney Miller - First 6 episodes.
The Partridge Family - First 6 episodes.
Diff'rent Strokes - First 6 episodes.
Starsky & Hutch - 2 Hour Pilot and first 5 episodes.
Three Stooges - 5 episodes.
The Jeff Foxworthy Show - First 6 episodes.
Free Movies OnDemand (OnDemand -> Free Movies):
Award Winners - Funny Girl, Kramer vs. Kramer, Legends of the Fall, Places in the Heart.
Drama/Suspense - Absence of Malice, Avalon, Brian's Song, Bridge Over The River Kwai, Double Impact, Obsession, One False Move, Repulsion, Tap.
Action/Adventure - 5th Musketeer, Armed and Dangerous, The Deep, Genghis Khan, Money Train, Once Upon China.
Family/Musicals - Bye Bye Birdie, Magic in the Water.
Comedy - The Comic, Hardbodies, Just You and Me Kid, Man Who Loved Women, The Sluggers Wife, To Die For, Wholly Moses.
Horror - 976-EVIL, Brainscan, Curse of the Mummy's Tomb, Dr. Strangelove, Johnny Mnemonic, Night of the Living Dead (1990 version), Pulse, Wolf.
Enjoy.