So many times I walk into classrooms that have posters or bulletin boards coated with post-it notes. iBrainstorm is a virtual post-it launcher. Students can be using their iPods or iPads and launch their own notes to your devices with the flick of a finger. This would be a fun way during reading to share vocabulary words or demonstrate their reading strategies. In math, students could launch answers to the teacher's device.
You as the teacher could choose to do what you wanted with the materials just like you did with your posters/bulletin boards full of post-its. Print it, post it on your website, email to your students, post on Edmodo, blog about it, etc.