A tool that will help you make all sorts of arrangements from car coordination, team assignments, lunch menus, etc. One example of someone that would really benefit from such a tool would be a school teacher that has to regularly divide the students into groups for various activities. The ability to create profiles for each student will make arrangements a visual activity and in addition, the ability for the tool to create groups for you will make creating a group fun and efficient.
Please check out this youtube video to help you understand Arrangements:
http://www.youtube.com/watch?v=gT5lbZpBXkU