EDIT: Answered below.
Bit of a weird one. I'd like a second Save button that saves a node but that I could target with some php.
My use-case isn't as simple as using Autosave and I don't want to start installing WorkBench or any other module for a small feature.
I could have a taxonomy field above the save where users can choose, but really, I'd prefer a second Save button for UI reasons. I could also use jQuery and have psuedo-buttons that click the appropriate term and then the save button, but I'd rather do it programmatically.