Thanks for helping us share the news! My only addition to your comment: if you sign up through GMAT Club, you get a $100 discount and free access to the GMAT Club practice tests for one year ($250 value). As a member of GMAT Club, you can access that promotion here:http://www.knewton.com/gmat/pricing/gmatclub/
Hope this helps!
Knewton GMAT Team