Sourdough according to Meyers (day 4)

So this is my first attempt at making sourdough from scratch... It's based on a recipe by Claus Meyer (in Danish :-S)...
So far (day 4 out of 10) the thing looks a bit alive. It's supposed to end up smelling like a good, dark beer, but I'm not sure how that smells like!
Only 6 days to go...