Not sure how many people here use lingq.com in combination with this site, but if you haven't been, you should check it out. Unfortunately, Korean isn't an official language there yet there, but you can still use the site to study Korean.
What I do is copy the text of the PDFs here, and paste it into a new Portugese lesson on lingq (I have no plans to learn Portugese).
Right now you can vote for which language lingq should add next, and Korean is one possibility. Currently the voting is pretty much tied between Cantonese and Korean, and of course I would like to see Korean win! So, even if you aren't using the site, help me out and click on Korean here.