Our Twitter bot will allow all allowed users to post updates as @HSNOTTS on Twitter by simply sending a DM from their own twitter accoutn to @HSNOTTS.
The script is fairly simple. It uses single user authentication to log into the @HSNOTTS account and download the DMs. It then checks the sender of each one against it's allowed users list. Any that match are simply tweeted out.
This script will be run every 10 minutes or so via a cron job.