I don't know if there's really a way to track everyone....unless they come to Silver or I and say they're not playing anymore.  As for which threads are around....beyond those you know belong to an active character, the ones we're not using will get lost in the Elliquiy Shuffle so to speak.<br/><br/>My suggestion to you would be to bookmark the Location Index thread (that's what I do) instead of trying to have everyone's locations bookmarked.