As I explore pay-per-node more, I'm noticing that one feature that's lacking is the ability to tie node creation to workflow status. uc_nodetype actually does this right now.

It would be great it you could set a node to be added only when a transaction is completed. We could easily add some sort of email notification to this. So, say that I purchase a job listing online and pay with an invoice, when my invoice is received, a site administrator could set that status via ubercart and I would get an email explaining how to create a job.