Need your recommendations for an expert

Who would be your top pick for a new soil expert to join our forums? Or, who would you most like to be able to "talk dirt" with?

The criteria is:

1) Please nominate just one name, along with any contact info you can locate;
2) It should be someone who is not currently a member here;
3) This person should be a familiar name in "dirt" circles (master gardener expert, business owner, writer, etc.)
4) Since this person would be a regular participant in our forums, their availability/willingness to participate and their personality (no overblown egos, please!) should also be taken into consideration.