The social bookmarking site, StumbleUpon has been working diligently to improve its site for its users. Already they have released new features on the site in the UK, features like personalized suggestions as you stumble and updates for their mobile app on the iPhone and Android. Due to these changes, StumbleUpon has updated their Terms of Service (TOS) which will cover the new features and hopefully be more transparent for their users to easily understand. …