You can find the PDF at StarWars.com, and here is the link for earlier chapters.
At Amazon, the Kindle download is now available; as in a previous occasion, they seem to have accidentally put a 99-cent price on it — I've let the folks in charge know, so that should soon be fixed. Meanwhile, here are the (free!) links for Barnes & Noble and the Sony eReader.
I'll try to do the production notes for #5 and #6 simultaneously — although it should be pretty obvious that I'm behind on a lot of website stuff. They're on the list!