I've been converted to your method of using the "Posts Since Last Visit" method. For those who haven't done it yet, when you're on the main forum menu screen, just go all the way to the bottom of the page and click on "posts since last visit." It'll show the ones that have new posts and if you click on the little yellow arrow it'll take you to where you left off.
Now available: Starless Midnight, by Lynn Garthwaite. Both paperback and Kindle