Looks like it is raining promos on the Amazon Appstore today.
After offering 7 Productivity apps for free, they are also offering the ad free version of Angry Birds Star Wars for free.
You can get the game for free from the Amazon Appstore app on your device. Or you can use the web page links below.
Angry Birds Star Wars (Ad-Free)
If you have a Kindle Tablet Edition, you can get the Premium Edition for free:
Angry Birds Star Wars Premium HD (Kindle Tablet Edition)
And while we are at it, you can also get the ad free Angry Birds Rio for free too: