Well, I have been persuaded to reread it and it does seem like he continued it at some point... and it's even better than I remember. Thanks for making me check it out again Fish.
MS Paint Adventures has been doing a storyline called Homestuck for a long while now. Previous to that is the completed story of Problem Sleuth. Problem Sleuth's story was progressed via fan-submitted suggestions on what action the main character should take next. Homestuck doesn't seem as hands-on as Problem Sleuth in terms of how the story progresses. Either way, it's entertaining as hell.