lightroom 3 - How to share a raw file including LR development settings

How do I send someone a .CR2 raw file with Lightroom adjustments applied?
In that way someone could open the raw file in their Lightroom and see what development settings I have used, apply other adjustments and send it back to me such that I can evaluate it and work further on it.

Answer

You can export to a DNG file which is not a CR2 file, but is a digital negative (RAW file). It isn't the original Canon format, but should contain most of the same information, if not all of it (it also has an option to embed the original). I believe that the DNG will have the Lightroom alterations applied to it. You can export it using Export and choosing DNG as the format.