The City of Toronto Council approved the the new harmonized zoning by-law on April 3, 2013. The agenda details and Council votes on the matter are available at http://app.toronto.ca/tmmis/viewAgendaItemHistory.do?item=2013.PG21.1
The by-law to enact the new harmonized zoning by-law will be before Council at its meeting on May 7, 2013.
For further background, see the City of Toronto's Zoning Project Website.
Update - Related Blogs: City of Toronto Enacts New Harmonized Zoning By-law 569-2013