Nevermind, answered my own question. Pretty much works now. Once I've gotten a more permanent setup I'll post a link.
One of my main confusions as of now is the hash file. The file needs to exist fot posts to be made, and its value is present in the html for the input field.I just made a file called hash and gave it arbitrary contents and things started working, but I'm guessing the value is supposed to be changed dynamically (once per post, maybe)? So, what purpose does the file serve?