Hello Mike,

I am the author of a simple client server conference/Registration software product that has been used by an association for their conference the last two years (2008, 2009). It has most of the wrinkles worked out and could be tweaked to meet your needs (it does not have email confirmation, but that could be added depending upon your time requirements).

http://www.willamettepcservices.com/prodsb.htm

If interested, you can contact me via that site to avoid spam...

Regards,
Todd