MS Paint Adventures: Homestuck presents a lengthy recap of everything that’s happened so far. Here’s your chance to catch up and start reading MSPA if you haven’t been already.
And here’s the awesome video finale for Year 1. (Note that, unless you’ve seen a lot of the previous year or at least read the recap, ‘awesome’ is not the same thing as ‘comprehensible’.)
EDIT: A hyperlinked version of the recap was made for enhanced explanification. It’s here.