It's not much, but if you have an account with ebates.com (you can sign up here
http://www.ebates.com ) and click through to the best buy website through ebates, ebates credits you with a 1% rebate on your purchases. You can still use any site-specific coupons, so this could be used in conjunction with that 10% best buy coupon I've seen some references to.
This is basically free money, especially since Best Buy will let you order the S3 online but then pick it up at your local store.
