Some information has been published about the state of Mobile development.
It's sourced from developers not the general public.
May not represent exactly what you identify with but is interesting nonetheless. Especially for trends which shows how this sub population is going.
Windows Phone 7 was launched 4 months before the survey, so data is not comparable to others.
(Side issue. The choice between SVG and Canvas in HTML5 can be hard to make, when it's so new. Here's a rational look at the situation http://j.mp/kKElmT. (Some of the comments are real trolling!!))