Dragon Age 2 and Dragon Age: Origins (pc digital download) will briefly be 60% off with promo code at Origin if Origin Insider Deals gets 800 likes on their deal post by 6:30 pm PT. Update: The Facebook goal has been reached, so expect a promo code at around 6:30pm PT. Details on how Origin Insider Deal discounts work after the break.
Origin Insider Deals, formerly known as EA Insider Deals, will post a promo code to be used in Origin's shopping cart once you're ready to check out. They typically post the code at around the designated time (usually within an hour), which is 6:30pm PT in this case. The code is usually valid for at least two hours after the designated time, which is 8:30pm PT in this case. Although there are also cases in which "Quantities are limited," which means that the code can only be redeemed a limited number of times, OID seems to have set aside a more generous number of redemptions than in the past.
You must perform your purchase on the website and not the client itself. For some reason, there is a backend dichotomy between the two.