Print release notes for given projects.
drush pm-releasenotes
projects : A list of project names, with optional version. Defaults to 'drupal'
--html : Display release notes in HTML rather than plain text.
--source : The base URL which provides project release history in XML. Defaults to http://updates.drupal.org/release-history.
--dev : Work with development releases solely.
Prints the release notes for the recommended version of CCK project.
drush rln cck
View release notes of a specfic version of the Token project for my version of Drupal.
drush rln token-1.13
View release notes for the recommended version of Pathauto and Zen projects.
drush rln pathauto zen