suggests pinboard users you might want to add to your network based on your twitter friends

twitter2pinboard.py

#!/usr/bin/env python

"""
twitter2pinboard.py is a little hack to help you build your pinboard
network based on your Twitter social network. I imagine pinboard will
be adding something like this shortly since they've got some beta Twitter
support now. So rather than turning this into a full on webapp it's just
a command line tool for now.

twitter2pinboard.py uses the Twitter API to look up your friends (people you 
follow) and then looks them up on Pinboard. The big assumption here is that 
the screen name on Twitter matches the username on Pinboard. 

You'll need to register the script as a Twitter application to get the oauth
credentials that you will be prompted for when you run the script.

    https://dev.twitter.com/apps/new

Obviously, you'll need to have Python available, ayou also need to install 
Python Twitter Tools:

    http://pypi.python.org/pypi/twitter/

Comments, questions:
Ed Summers <ehs@pobox.com>
"""

import urllib

from twitter import Twitter, OAuth

token = raw_input("Access Token: ")
token_key = raw_input("Access Token Secret: ")
con_key = raw_input("Consumer Key: ")
con_secret = raw_input("Consumer Secret: ")

twitter = Twitter(auth=OAuth(token, token_key, con_key, con_secret))

def friends():
    user_ids = twitter.friends.ids()
    # request profiles 100 at a time
    for i in range(0, len(user_ids), 100):
        ids = ','.join(map(str, user_ids[i : i + 100]))
        for profile in twitter.users.lookup(user_id=ids):
            yield profile

def on_pinboard(username):
    pinboard_url = "http://pinboard.in/u:%s" % username
    u = urllib.urlopen(pinboard_url)
    return 'not_found' not in u.url


def main():
    for friend in friends():
        screen_name = friend['screen_name']
        if on_pinboard(screen_name):
            print "http://pinboard.in/u:%s" % screen_name

if __name__ == "__main__":
    main()