Default Workflow_ng configuration does not work

Issue Summary

Hey Ryan,

Sweet module. We're going to use it to start selling Pay Per View video access on our site.

However, the WF_ng config default does not seem to work. Right now it looks for the event "Payment gets entered for an order" - but when I used this with the Gift Certificate module, which I guess overrides the payment system, the Workflow never gets fired. I suppose this is probably more of an issue with the Gift Certificates module (more reason to start looking at the Discount Framework) but I'm wondering if by default, it shouldn't fire on a Payment but on Order Status Update.

I created a new Workflow that checks the balance on Status update to "Completed" and this seems to work fine.

I realize I have probably answered my own question but wanted to get your thoughts.