Swampboots. To follow posting history............... Click on posters name. Membermark them. They will automatically be below your boardmarks on your favorite page. At anytime you want to read their posts just click on their name.
Not sure if it's premuim service but another cool feature is you can keep any message you read by clicking keep at top of post.
Anytime you want to reference that post click on your mail at top of page.