Exactly what I was looking for, thank you!
I have a follow-up question in this same vain. I need to do this for several animations, on the same character. Basically, I'm changing the overall pose of the 'idle' animation, so that needs to be moved to all the animations, with all the parts being equally translated and rotated, throughout all the different animations. Is there a way to 'paste a pose' from one animation, to the others, and have it change all the keys, not just on the pasted key?
PS: It would be pretty awesome to get something like 'animation layers' once the graph editor is fixed up.