After assimilating various sources of information I am coming to a few conclusions about the EOS M. I'm sure image quality will be excellent with the 18MP sensor we have seen before. Canon has a patchy record on kit lens quality, but I expect the EF-M 18-55 to be decent, as should the 22mm pancake. Autofocus, though, looks like it's very sluggish compared to rival CSCs, which really surprises me. I'm sure I will like the multi-touch screen and the overall industrial design of the EOS M looks high class. Anyone middle-aged and older will struggle with a camera that doesn't have a viewfinder unless they're wearing their reading specs, so this camera will appeal more to younger people. We'll have to see about pricing as the list price is high. A Lumix GF5 is smaller, lighter, has a built in flash and is at least a couple of hundred quid cheaper. A Lumix G3 has a viewfinder and is only a little dearer than a GF5.
Is anyone here tempted by an EOS M? Naturally the provision of a mount adapter to enable the use of EF and EF-s lenses must be attractive to EOS shooters. Maybe lots of Powershot G9s, G10s, etc. will appear on eBay in October when the EOS M ships