The problem I have is that I frequently don't have time to read the whole thing while I'm in work. This means that I have to leave all items on the page and try to remember exactly what I've seen and what I haven't. A lot of the nodes have very similar names and trying to remember if you've seen a particular node is quite hard.
I use at least two different browsers (Actually I regularly use three :-(), so I don't have the the browser history colouring links to make visited nodes obvious. What I really want it to do is let me have different times for each section. This would mean that I could read all additions to a particular section, and then just clear it, but leave all the other sections that I have not read intact.
A button on each section, and a master button that would update all sections to the current time is what I would really like.
Nuance
Baldrick, you wouldn't see a subtle plan if it painted itself purple and danced naked on top of a harpsichord, singing "Subtle plans are here again!"