If you start Signal to Noise now you'll never get around to whatever else it is that needs to be done until after you finish reading what's there so far and pine for more for at least a few hours. Or at least that was my reaction when I made the mistake of diving into it head first during finals last year--and with only Wikipedia spoilers under my belt to make sure I didn't drown.

/takes her sodding metaphors and disappears again :'D