[quote name='VioletArrows']Refer a friend. A person signs up under you, you both get extra experience when you level together, and the referrer gets a zebra mount at level 30.[/quote]
3X experience when you're in a party with that person and you can port to each other instantaneously for 90 days. And like VioletArrows said, a zebra (aka "Zhevra") mount at level 30.
I would say that you won't find deals this week, but maybe closer to the release of Warhammer Online? Maybe they'll lower prices to steal away some of those WAR sales.