"Also in development is a focal length reducer for EF lenses, this will be announced with the 20mp EOS M camera"
That is something you hear about more in astronomy. But a 0.8 focal reducer that would turn your 10-22 3.5-4.5 into, say, a 8-18 2.8 - 3.6 would be interesting. A Meade or Celestron focal reducer costs in the neighborhood of $100. Count on the Canon being $300, maybe. Because it is Canon, and because it has the EOS electronic connections.
Let's see -- a .8 reducer would make the 85 1.8 a 68 1.4. But the efl would still be a bit over 100mm because of the crop factor. This sounds intriguing, but will probably not be inexpensive.
A reducer factor of 0.63 would restore EF lenses to their full frame optical values. (0.63 = 1/1.6). I wonder if that's it....