I just finished creating a nice little Typo plugin that allows you to follow a Twitter user in the sidebar.  The plugin itself is pretty simple as the heavy lifting is done in the twitter.js library.

Download and install the plugin from github

script/plugin install git://github.com/pillowfactory/twitter-plugin-for-typo
 
# ...and if you don't use git (yet)...
 
script/plugin install http://pillowfactory.googlecode.com/svn/trunk/plugins/typo_sidebar_twitter/

from your Typo installation.

See it in action here on the sidebar.

Questions, comments, and suggestions are welcome.