We are having a week-long tech institute at our school - the opeing day will provide  frame wiht a focus on Web 2.0 - the importance of students having opportunites to use 21st skills for learning - because of the extrodinary value of the skills themselves. I am looking for a perfect web 2.0 opening - to hook and energize the teachers attending and to give them a sense of what Web 2.0 means - I need ideas !!!!!!