My Google Voice number has served primarily as a messaging service students call (sometimes spontaneously during the instructional period, more often outside of the classroom) to record dialogues, poetry, even song, either individually or in pairs. These recordings are stored on Google servers, but can be downloaded and posted on course management pages (Moodle, Blackboard, Sakai, etc.) or podcasting, blogging, or social networking sites (I post particularly good recordings on my Spanish Facebook page).