So after a little digging, I discovered the following (we have to wait until next week):
http://slickdeals.net/forums/showthread.php?t=3209320
"Starbucks yesterday announced a promotion that will be starting August 23rd similar to the iTunes song of the week, only this time it is an iPhone app of the week. They kicked it off with a serious value with Shazam Encore being this weeks app. This version of Shazam is usually around $6 and allows unlimited tagging. Quite the deal for just a trip into Starbucks, even if you get a coffee!
If there are no physical card at your location you may try the following:
"To get the free apps, youll need to head to your local Starbucks, connect to their Wi-Fi network, and click into the Starbucks Digital Network. A shortcut for iPhone owners is to use the official Starbucks app (free), which has a direct link into the Starbucks Digital Network."
Via CNET."