You can access it by either touching the Google search widget, or long press the home button, and it'll pull up the task manager, which will give you 3 options at the bottom of the screen. The middle one is Google Now. Hope this helps.
Here's a similar thread I posted screen shots. It is on the mobile version of the site. When I get home I can show the desktop version. The instructions are in there as well to turn Now on.
Using the "Send" option on the first post of a thread in the mobile version gets you the desktop link to the discussion.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.