One of the biggest problems with actions (as I think someone pointed out recently) is that if you want to move or delete them you have to hunt up all of the keys on many separate layers.
Both can be done easily using the 'rescale keyframes' command. To move a single-frame pose action, check the 'entire document' box and enter the actions current frame as the 'start' and the next frame as the 'end'. Then enter the frame you want it moved to as 'new start' and and the frame after as the 'new' end.
As long as there are no keyframes on the destination frame, there doesn't seem to be any trouble. It will 'jump' them past any intermediate keys.
To delete an action altogether, move the single-frame action to frame zero 'new start' and frame 1 'new end'.
Hopefully this isn't a new idea to only me.
