After leaks via the rumor sites (presumably the soure is the affiliate retailers (not Amazon)) Canon has indeed announced their first mirroless EOS-M model as expected. Unfortunately, there is little in the way of innovation, though, like, Nikon they now have a platform to compete with the likes of Panasonic/Olympus and Sony, should they ever decide to do so.
All of the system can be pre-ordered at Amazon.
From this picture, the new mount adaptor appears not to have rubber sealing, suggesting no pro-level EOS-M model for sometime. Olympus recently upgraded theirs (MMF-3) for use with the introduction of OM-D and SHG lenses.