Your Internet Consultant - The FAQs of Life Online
I always find it somewhat disturbing that there are companies that would want to do this. Fortunately for the Internet, it is not possible to send an "E-ad" to every person on the Internet.
Unfortunately for the Internet, it is probably only a matter of time before some sick mind figures out a method of simultaneously annoying every Internet user. For now at least, there is no way to post an e-mail message to every Internet user, nor in my opinion, should such a tool be developed.