Click and play me before going any further...it adds effect.
The official list thus far:
http://www.pazsaz.com/cancel.html
4Real (CW)
Ending after seven episodes, final episode on 11/23/2008
Battlestar Galactica (SCI)
Ending after four seasons, final episode on 3/20/2009
Boston Legal (ABC)
Ending after five seasons, final episode on 12/8/2008
Celebrity Exposé (MNT)
Ending after two seasons, final episode on 10/27/2008
Charlie Jade (SCI)
Ending after one season, final episode on 10/21/2008
Christina's Court (SYN)
Ending after three seasons, final episode on 9/?/2009
Dirty Sexy Money (ABC)
Ending after two seasons, final episode on TBA
Do Not Disturb (FOX)
Ending after three episodes, final episode on 9/24/2008
Easy Money (CW)
Ending after four episodes, final episode on 10/26/2008
Eli Stone (ABC)
Ending after two seasons, final episode on TBA
The Emperor's New School (DSNY)
Ended after two seasons, final episode on 11/20/2008
ER (NBC)
Ending after fifteen seasons, final episode on 4/2/2009
The Ex List (CBS)
Ending after four episodes, final episode on 10/24/2008
Flip That House (TLC)
Ending after four seasons, final episode on 10/28/2008
Foster's Home For Imaginary Friends (CAR)
Ending after six seasons, final episode on 5/?/2009
Haunting Evidence (TRU)
Ending after three seasons, final episode on 10/25/2008
In Harm's Way (CW)
Ending after five episodes, final episode on 10/26/2008
Kyle XY (FAM)
Ending after three seasons, final episode on 3/16/2009
The L-Word (SHO)
Ending after six seasons, final episode on 3/8/2009
Late Night With Conan O'Brien (NBC)
Ending after sixteen seasons, final episode on 2/20/2009
Lipstick Jungle (NBC)
Ending after two seasons, final episode on 1/9/2009
MADtv (FOX)
Ending after fourteen seasons, final episode on 5/?/2009
Mind Of Mencia (COM)
Ending after four seasons, final episode on 7/23/2008
# The Morning Show With Mike & Juliet (SYN)
Ending after three seasons, final episode on 6/?/2009
Moral Orel (ASW)
Ending after three seasons, final episode on 12/18/2008
My Gym Partner's A Monkey (CAR)
Ending after four seasons, final episode on 11/27/2008
My Own Worst Enemy (NBC)
Ending after nine episodes, final episode on 12/15/2008
Opportunity Knocks (ABC)
Ending after three episodes, final episode on 10/14/2008
Prison Break (FOX)
Ending after four seasons, final episode on 5/15/2009
Pushing Daisies (ABC)
Ending after two seasons, final episode on TBA
The Shield (FX)
Ending after seven seasons, final episode on 11/25/2008
Shin Chan (ASW)
Ending after two seasons, final episode on 12/14/2008
South Of Nowhere (N)
Ending after three seasons, final episode on 12/12/2008
Stargate Atlantis (SCI)
Ending after five seasons, final episode on 1/9/2009
Survivorman (DSC)
Ending after three seasons, final episode on 12/19/2008
The Tonight Show With Jay Leno (NBC)
Ending after seventeen seasons, final episode on 5/29/2009
TRL (MTV)
Ending after nineteen seasons, final episode on 12/16/2008
Valentine (CW)
Ending after four episodes, final episode on 10/26/2008
The Xtacles (ASW)
Ending after two episodes, final episode on 11/9/2008