I'd love to see some functionality added to the site where the recent threads you have replied are listed. Forum Spy is good, but only while you are actively on the site. Quote Notifications are great to see that someone has specifically replied to you. However, there are times when a thread you were active in has replies, but has been pushed down by more activity. And it can be a pain to search for your own activity to see the activity in those threads. It would be nice to see one of two situations implemented. When you are logged in and go into a forum like iOS, iPhone or Mountain Lion, that below the standard stickies are personal stickies, consisting of the last 3 or 5 threads within that forum that you have replies or activity in. The other option would be above the stickies/above the post new thread, but below or in the box with your data (welcome, name, last visited, PM data) could be a section of 3, 5, or 7 threads, site wide, that you have replied on. This would allow you to see the last poster/last post date and quickly access it.