The SM3 website should have a very prominent link to the forums, since that's where the action takes place.
Also, if I'm logged in on my character page, and I click on one of the Background links to do some reading, I lose all of the "The Game" links, forcing me to log in again to get back to my character. Or just hit the back button on my browser a few times. But still, it should remember that I'm logged in.
I'm aware of both of these. It' still very much a work-in-progress.
