The documentation for Views 2 and Views 3 for Drupal 6 and Drupal 7 is contained within Views module! Install the Advanced Help module to access it.
Image may be NSFW.
Clik here to view.
Screenshot example showing Advanced Help when clicking on the "?".
Which Branch: Views 1, Views 2 or Views 3?
Views 1.x is for Drupal 5 (and earlier). Views 2.x and 3.x are for Drupal 6. Views 3.x is for Drupal 7.
