Can we launch an Appear.in widget and then trigger a snapshot?
Well, we can launch the video chat but not take a snapshot during that. Oh well.
There are some Javascript widgets, including one called Kipura, which uses HTML5, which can control a webcam. But no immediately obvious code to do snapshot.
I created http://tiny.cc/xAPme (as in zap me) as a short URL that you could use to generate interest… but what would you do with this? Well at present, it does lead to the Precision Education page. You can then see the Activity counter in GrassBlade gradually going up.