You can search the the GEDCOM to find information about a particular family or individual. Registered users can login here to search the complete GEDCOM. If you are logged in you should see a padlock icon in the upper right corner.
Enter the first name or surname of the individual you are interested in. A '%' can be used as a wild card. For example, for all users with a first name starting with a B you would enter 'B%' in the first name field.