This thread discusses the Content article: Canon 40D

It will be interesting to see what Canon come out and how the camera stacks up to the rumours that have been floating around the net for a while now. You think Canon will use the same 10 megapixel sensor as seen on the 400d? Do you think they will go for a larger sensor? 30d was not a massive step forward from the 20d, hopefully Canon will take a larger step with the 40d.

I can't see Canon going beyond 10mp for the 40D otherwise they lose the differentiation between the 5D/6D and the 40D. But I really doubt that the 40D will have LiveView.