I made a Wordpress Plugin for people who wants to easily add GAOTD offers in their site.
With this plugin you just need to create a post or page and then add the shortcode [giveawayoftheday] on the post/page content and it will insert the current GAOTD offer.
This plugin supports po/mo translation, so it can be used with any language, and by default comes with native english and pt_BR po/mo files (yes I am from Brazil).
This is my first Wordpress plugin, hope it will be useful for someone.
Link: http://www.falarcompaulo.com.br/download/gaotd-shortcode_v1.0.5.zip
Btw, the only requirement is that your server supports "allow_url_fopen", there is more info about this and other stuff in the included readme.txt file.