The only limitation we have encountered with the Twitter module is simply that Tweets are posted either when a node is created or updated (or both).  Many of our enterprise clients, however, have implemented approval workflows between content authors, editors, and publishers -- that is, some people write material for the site but others revise and edit the material prior to publication.  The Twitter module does not, by design, handle this circumstance.

 

Andy Zhu, a (near-genius) developer in our Strategy & Support Group, decided to resolve this limitation and has shared an elegant solution with other members of the Drupal community.  His contribution is a snippet of code which can be used to extend the functionality of the Twitter module.  This page describes how to implement the code in your own site.