Updated. Here’s another $2 in free Amazon MP3 credit up for grabs. Visit this link for the details – you’ll need a Facebook account for this one (real or spam account, you decide).
It should increase your gift card balance for music purchases only. Limit one promotional credit per customer, so my wife and I both jump on these to fill up the iPod. We download the files manually and combine them onto a shared iTunes library. Must be redeemed by 11:59 p.m. PST on January 10, 2013.