Here's the most recent "calls for entry" for visual arts juried art shows in the Greater Toronto Area. I'll gladly post any others you know about. Just leave me a note in comments. Good luck!
Deadline Dec. 1, 2011. For OCAD University alumni "Where They Are Now!" http://www.ocad.ca/Assets/pdf_media/submission+form+2012.pdf Note: 2 years at the college/university qualifies for alumnus status
Deadline Dec. 18, 2011. Artists Network "MonArchy". As a playful acknowledgement of Queen Elizabeth II DIamond Jubilee in 2012, Artists Network are asking artists which side they align with. http://www.artistsnetwork.ca/node/330
Deadline Dec. 20, 2011. Visual Arts Mississauga 34th Annual Juried Exhibition. Art Gallery of Mississauga. FYI : art work must be made in 2011 - 2012. Application: http://www5.mississauga.ca/agm/agm_root/downloads/VAM34.pdf
Deadline January 24, 2012. Ontario Society of Artists (OSA) 139th Annual Open Juried Exhibition. John B. Aird Gallery, Toronto. Theme: "Darkness and Light" http://ontariosocietyofartists.org/member_events_exhibitions/open_juried_exhibition
Deadline January 31, 2012 World of Threads Festival .Fibre Art. http://www.worldofthreadsfestival.com/submissions.html At least seven venues in Toronto and Oakville, including Abbozzo Gallery (Oakville), Joshua Creek Heritage Centre (Halton) and the Sculpture Society of Canada Gallery (Toronto).
Deadline Feb. 2012 Paint Ontario Art Competition, Sale & Show http://www.paintontario.com/form.htm Lambton Heritage Museum, Grand Bend, Ontario