Student Use in the classroom

I see in some previous posts that many people are starting to put the iPads into the hands of our students. I am curious to hear how people have been using them in the classroom with the kids. Have students been using them in small groups? Have they been rotating through a "station"? Has anyone been able to bring more than one iPad into the classroom at the same time for students to use? Any suggestions for using them based on what you have experienced?