Aweber has a new api https://labs.aweber.com/ and based on that they have written a plugin: http://wordpress.org/extend/plugins/aweber-web-form-widget/ for WordPress that adds a widget. In my testing ( latest WordPress, default theme, PHP version 5 ) I have not been able to get this plugin to work.
I et through authentication ok, but am unable to pull anything through the API to make the widget work.
Can anyone else verify whether or not the plugin is working for them.
Also, has anyone else built anything that works with the API yet?