Does a FREE ldap.verisignlabs.com exist that works? 
Where you can lookup by organization all their websites?

Hi there,

If you visit http://ldap.verisignlabs.com/ you will find it now works
again. Must've just been a temporary glitch when you posted this
question.

I tested it by searching for Google as the organization. It comes up
with quite a few interesting results, like:

yoshka.org
googledoodle.org
googlesex.com
google-box.com

Have fun with it - I believe it is the only free tool online for
searching whois info in this manner.

Best wishes,
robertskelton-ga

You should've posted it as a comment...