Do you still not have the offline option for Google Docs?

If you’re a Google Apps user, then your apps administrator has to enable it first:

  1. Log in to the Google Apps control panel at (replace _your_domain.com_with your actual domain name).
  2. From the menu bar at the top of the page, click Settings.
  3. In the left menu, click Docs.
  4. Select the Allow users to enable offline docs check box.
  5. Click Save changes.

Then your users can choose to set it up in the same way normal gmailers can with the docs cog in the corner:

Hope this helps you out.