Quoted from robin:- You probably already noticed on the forum home page: Pinside now keeps track of the threads you visit and when you last visited them, allowing us to show you when threads are updated with shiny badges .
This is great and was really needed. Only thing to add now is a link that will take you to your last read post in the tread. If you miss a long thread for a few days you still have to scroll through it to find out where you stopped reading.
...... Actually it looks like you may of added this feature and i spoke too soon.