Takeshi attended the webinar and I wasn't able to. We have a number of Xerte LOs based round learning English grammar and developing listening skills. I have no idea whether we have used page types in innovative ways, but we'd be happy to share some of these LOs... when we can work out how to do this! At the moment they are hosted in Blackboard, but we have plans to put them on a publicly-accessible website.
One thing we are planning to do is to embed links to the grammar LOs within QuickMarks in GradeMark/Turnitin, so that in providing feedback on student written work, students can get straight into explanations and exercises related to their language errors. When we have done this and we get some feedback we'll share it.