Keybr.com has now fully integrated the Twiddler3 into their Web Typing Tutor. Give it a try at: http://twiddler.keybr.com/
Keep in mind that this is just the start of the full migration of the Twiddler Typing Tutor to keybr.com. Over the next few months you will see more features and functionality appear in the Tutor.
Please keep sending your questions, comments and suggestions about the Tutor to the forum, for now.