Actually, last night I did finally figure that out and signed up, but right now I am at work! I wasn't sure if I should try signing up from both places or not. I thought it might not let me sign up from two different machines with the same user name. But I suppose I could give it a try and find out.
By clicking on the User Name, you will requery the forum for that user. You will see everything that he or she has posted with that Mudcat name.
By clicking on the Thread Name, you will be sent to the Forum on that thread as if you selected it from the main Mudcat Forum page.
By clicking on the Subject, you will also go to the thread as if you selected it from the original Forum page, but also go directly to that particular message.
By clicking on the Date (Posted), you will dig out every message posted that day.
sj