I just got around to checking this out. This is what worked so far... note you'll have to have a "my yahoo!" account for this one:
Click here:
http://e.my.yahoo.com/config/xcontent
Enter this:
http://www.reefsanctuary.com/forums/external.php?type=rss
And you should be good to go! Then you can view the latest RS threads from your yahoo home page.
T