I am LinkedIn for work related topics.  I had to create an account, sign-up 
and be approved to get into the groups I belong to.  I believe that Noel has 
created a group, which would be similar to the list serve.  I receive a 
digest once a week related to the topics I chose.  I have NOT received any 
unsolicited emails and have been a member for a few months.

Mike C.

Test every home for radon.