Gifted Issues Discussion homepage Forums Identification, Testing & Assessment Testing with professional experienced with gifted

You've received great replies. I'll just add this brief roundup of links:
1) As a starting point you may wish to check the lists on Hoagies' Gifted Education Page: Psychologists, Professionals.
2) The articles by Aimee Yermish and Nadia Webb, mentioned in this old post, may be of interest.
3) This old post on How much error can there be in test scores? may be of interest.