I was asked via e-mail to post this information on April 21st, 2003 (the link is still working a year later so I am leaving the info here):

Take the journey of a lifetime with Worlds Apart, a new prime time series on
the National Geographic Channel.

We are looking for 12 American families willing to travel to a remote
location outside of the United States for two weeks. Forget the creature
comforts of home and prepare to embrace another way of life. Are you willing
to take the challenge?

If your family is outgoing with lots of personality and ready for an
adventure, then you must also meet the following criteria:

1. Have children (ages ranging from 6 to 18) who are able to travel.
2. Be available to travel for two weeks.
3. Be in good overall health and have health insurance.

Here's how to apply:
www.nationalgeographic.com/channel/highlights/worldsapart.html

OR

Tell us why we should choose your family.
1. In a home video tape no more than 20 minutes long, take us on a tour of
your lives. Who are you and what makes your family special?
2. Please answer the questions listed below, and send it along with your VHS
or DV tape to:
Worlds Apart Box 116 245 8th Avenue New York, NY 10011
1. How did you hear about Worlds Apart?
2. Family name:
3. Each family member's name, age and gender:
4. Where is your family from?
5. Father's occupation?
6. Mother's occupation?
7. Does your family have any special interests or hobbies?
8. Your contact information