I have, in the past, talked about how the MyCokeRweards program has prizes where you can redeem your points for either a small device or large device code for SkinIt. In the past, I redeemed my points for a large device code and got a skin for my Sony 505.
Last week, I redeemed more points for a skin for my Nook. After spending a good amount of time designing it, I tried to redeem it but the site would not allow it. As it turns out, SkinIt will not allow you to use any gift card codes for ereader skins. IT is very frustrating that, although they have done it in the past, they choose to not support the ereader community unless you are giving them money directly, rather than via gift cards.
I am recommending people either go with
DecalGirl or
Unique Skins at this point. I included Unique as DecalGirl does not offer custom skins for the Nook. If DecalGirl does have custom skins for the nook, please let me know where. I couldn't find anything for custom skins on their site.