A module or solution to build first time user walkthrough?
The jQuery Joyride module would certainly be an option


  This module provides Drupal integration with Zurb's Joyride Jquery plugin in order to provide a tour of different html elements on your Drupal site. Drupal integration is done via the Context module, which provides a way to control conditional calling of the joyride plugin and copy-and-paste method for adding specific tour code.


It wraps around the excellent jQuery Joyride plugin