The Interactive Classroom add-in for PowerPoint and OneNote is now available for download as of last week:

Microsoft Interactive Classroom helps interaction and collaboration between educators and students by enabling the creation of classroom polls using PowerPoint, and sharing content with students using OneNote. Educators can insert a multiple choice, yes/no, or true/false polling questions to lessons using PowerPoint. Students who have laptops running Microsoft Windows and OneNote receive the polling questions and teacher annotations in real-time within their OneNote Notebook. In addition, students can add their own notes to the slides using the features provided in OneNote. They can also respond in real-time to the questions during the lesson. Students without laptops can participate in polls using hardware clickers. This gives educators real time feedback on how well their students are grasping their lessons.