[begin quote]I'm wondering why people keep signing in as GUESTS [end quote]
Mudcat is moderatley broken. It's difficult to register and get the login working every time. There is nothing to stop someone malicious registering and posting as (say) steve_heap
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.