Got this from ShoppingSquare's newsletter. You can get a free 2GB Sandisk SD card when you buy either Canon A450 or A550 from ShoppingSquare. 2GB Sandisk SD card is $28.85 from ShoppingSquare.
They have pretty good price on Canon PowerShot A450 ($137.95), but PowerShot A550 at $215.95 is not that deal (ShopBot price comparison).