With some help from drupal.org forums I have found that the user's profile can't be seen publicly until the user has logged on themself and activated their profile.
You see, I had created the user accounts and invited the users (who are staff members of the client's firm) to join but they have only returned to work this week A couple have now gone in and activated their accounts. All of a sudden, the profiles are publically viewable.
Anyhow, the public (non logged in) part of the site is now up and running and I am waiting on the client to supply the final few pages content and proof read the existing content so you might see some typos and some pages that are quite bare just now if you have a look at the site. One module I have used is the simple newsletter module to send a newsletter and it works okay but what I am really looking for is a module that I can say to it, send a newsletter to this group with content that meets x criteria (perhaps a taxonomy term or articles posted to a particular book or og).
I had a post from Bill Fitzgerald talking about the aggregator module to group certain content so that might be a place to investigate next.

Rob Wales