Open Data London asked whether there was any news about the Province of Ontario open data portal and when it might be coming. The response of "nothing new to report" doesn't bode well; not clear if it will launch in 2012 or ever.
UPDATE: This is odd because they appeared to have hired a project manager and to have a running project last year, as I posted in November 2011: short update on Ontario Open Data Portal.
At the time there was a Ministry of Research and Innovation (with Minister Glen Murray @glen4tc) but that is now part of the Ministry of Economic Development and Brad Duguid (@BradDuguid) is the Minister. ENDUPDATE