According to the latest rumors, Canon will release their first mirrorless camera in June. The announcement is confirmed in June, 2012.
The camera will have a 4/3 sensor and that it looks a little like Nikon’s V1 (better than V1). Unlike most of the renderings and concepts we saw floating around the Web in the last months, the upcoming Canon mirror-less cam will not be a vintage designed range-finder camera.
See also: Leaked pictures, specs about Canon mirrorless