In response to the obvious question: http://www.mathsjam.com http://www.mathsjam.com Thanks davidw for reminding me that I should actually mention it. ADDED I

In response to the obvious question: http://www.mathsjam.com http://www.mathsjam.com Thanks davidw for reminding me that I should actually mention it. ADDED IN EDIT: If anyone wants to offer advice on techniques for converting mailing list people to paying punters I'd be interested. I'm sure the advice would be more generally applicable.