For anyone looking to use their Best Buy gift cards to purchase Amazon goods, I just found that you can buy kindle-labeled Amazon gift cards at B&M Best Buy stores. I rarely find any good deals at Best Buy but BB gift cards are still a common gift to receive so I assume some fellow SDers will be in the same boat this holiday.
Going through plasticjungle you'd normally pay $8 commission on $100 exchange, plus you have to send in your card and wait for the exchange by mail. Not a "hot deal" but didn't know where else to post this where shoppers could make use of the info.
Only catch is that the cards are only available in $50 increments, oh and I haven't actually tested the gift cards to make sure you can buy anything at Amazon.