Nope, because you need to add some line of codes in your activity source and game salad only give you a apk file already compiled. Even if you could open the apk and inject code you aren't able to publish this in android market cause you will mess with sign key /zipalign process making your sign invalid.
Ok, I don't want to violate the terms and conditions so I guess it is not possible at this time. Hopefully Gamesalad will come out with a way to implement ads into android apps soon.
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Can I use Admob for Interstitial ads now?