post twitter from sendmail aliases pipe command.

set line like below to your aliases.
yourstream2twittermailaccount: |/some/where/stream2twitter.pl

Or, you can just do like
% ./stream2twitter.pl < mailbody

post to twitpic if a mail has a attachment.

Be aware! this script uses Config::Pit,
and .pit files should be at sendmail user's home directory.
# It is /var/spool/mqueue on FreeBSD

If you do not like Config::Pit, you should write $config directly.
Those variables are required.

    # for twitter
    # consumer key/secret from http://dev.twitter.com/apps/XXXXXX
    consumer_key
    consumer_secret
    # access token/secret from http://dev.twitter.com/apps/XXXXXX/my_token
    access_token
    access_token_secret
    # for twitpic
    username
    password

sendmail の aliases の pipe 起動から twitter に投稿するスクリプト
添付があれば twitpic に投稿