This list is updated as of May 2011.
Being Human -- The North American version on Syfy has completed its first season, and been renewed for a second.
The Cape -- Canceled before its first season was completed, after its order was slashed from 13 episodes to 10 (nine were aired; the remaining ep was available only online).
Caprica -- Canceled in October 2010 before completing its first season. Its five unaired episodes were burned off early in 2011.
Chuck -- Season 4 is complete. Renewed for a fifth and final season on May 2011.
Eureka -- Renewed for season 5.
The Event -- Season 1 is complete, and there won't be any more.
Fringe -- Season 3 is complete. Renewed in March for season 4.
Futurama -- Currently airing season 6 (the bottom half airing in summer 2011); renewed in March for season 7.
The Gates -- Canceled in October 2010 after its 13-episide first season had been aired.
Haven -- Renewed for season 2. Thirteen episodes will air Summer 2011 .
No Ordinary Family -- Season 1 is complete; canceled in May.
Sanctuary -- Currently airing season 3. Renewed in January for season 4.
Smallville -- Season 10, its last, is complete.
Stargate Universe -- Season 2 is complete; canceled in December 2010.
Supernatural -- Season 6 is complete; renewed for season 7.
True Blood -- Renewed for season 4, to air summer 2011.
The Vampire Diaries -- Season 2 is complete; renewed for season 3.
Warehouse 13 -- Renewed for season 3. Thirteen episodes will air in Summer 2011.
Being Human -- The BBC series has completed its third season. Season 4 is slated to air in the UK early in 2012.
Doctor Who -- Renewed for a sixth season, which will air in two parts in Spring and Fall 2011 in the UK.
Merlin -- Season 3 is complete. Renewed for a fourth season, which, however, will be delayed until 2012 in the UK.
Primeval -- Season 5 is ongoing.
The Sarah Jane Adventures -- Season 4 is complete; part of season 5 was filmed before Elisabeth Sladen's death, and will be aired as specials at a later date.
Torchwood -- Season 4 is in development and will air on Starz in 2011.