An explanation or more details of each feature that PRO differs from Basic in the pricing page would be nice. Specially the "iAd Functionality". And the plugin

An explanation or more details of each feature that PRO differs from Basic in the pricing page would be nice. Specially the "iAd Functionality". And the plugin is just for safari? You are ignoring a huge slice of potential users. No idea if it's worth it developing the plugin for other browsers though.