Uses the deliciousapi library to grab a random saved pinboard.in url and pop it into instapaper. Needs the version of deliciousapi.py with the modified pinboard.in api endpoint at https://gist.github.com/671964/e592caf3732a35241b980866c386a58aff2e65a9

pinboardaday.py

import deliciousapi
import random
import urllib
import ConfigParser
import os.path

class RandomDeliciousLink(object):
    def __init__(self, pinboard_username, pinboard_password,
                 instapaper_username, instapaper_password):
        self.pinboard_username = pinboard_username
        self.pinboard_password = pinboard_password
        self.instapaper_username = instapaper_username
        self.instapaper_password = instapaper_password

    def url(self):
        dapi = deliciousapi.DeliciousAPI()
        user = dapi.get_user(self.pinboard_username, self.pinboard_password)
        bookmark_urls = []
        for bookmark in user.bookmarks:
            bookmark_urls.append(bookmark[0])
        random_idx = random.randint(0,len(bookmark_urls))
        return bookmark_urls[random_idx]

    def post(self):
        url = self.url()
        data = {
            'url': url,
            'username': self.instapaper_username,
            'password': self.instapaper_password
            }
        data = urllib.urlencode(data)
        response = urllib.urlopen('https://www.instapaper.com/api/add', data=data)
        return response.read()
        
if __name__ == "__main__":
    config = ConfigParser.ConfigParser()
    path = os.path.expanduser('~/.auth')
    config.read(path)
    pu = config.get('pinboard','username')
    pp = config.get('pinboard','password')
    iu = config.get('instapaper','username')
    ip = config.get('instapaper','password')
    link = RandomDeliciousLink(pinboard_username=pu, pinboard_password=pp,
                               instapaper_username=iu, instapaper_password=ip)
    link.post()