First, thanks for responding, Dan, and that custom email action looks great! So far I can't get the "built-in" action to send an email at all, though, and I'm having trouble determining if it's a simple configuration issue, or if there is a larger problem. We have no trouble getting emails to send from WFFM, but so far, nothing has ever worked with our workflows.
I did try moving the action as you suggested, but it caused a situation where an author could click Submit on their side, but nothing would happen and the item wouldn't move forward to the next state.
I'm wondering now if it's a configuration issue somewhere, perhaps with the mail server. If I ever sort it out, I'll be back over to check out your module as a possible upgrade!