Hi Reuben,
You might want to reference one of these threads and let me know if this answers your questions:
http://www.datasprings.com/dnn-modu...der-number http://www.datasprings.com/dnn-modu...l-features If not, let me know. You can always create a flat table and with each record insert the primary key could auto generate the next number. If you are attempting to give them access to a number BEFORE they hit submit this is tricky though because two users might load the page at the same time and therefore they would get the same number.
Thanks,
Chad