Several months ago, the folks over at 37signals added multiple-lists-per-page support to Backpack, their simple personal organization tool, but didn't update the (otherwise quite excellent) Backpack API documentation, so I didn't update backpack.el.
Fortunately, a resourceful developer posted
his own documentation
for the new and updated API methods to the Backpack forum. I've
updated backpack.el accordingly:
backpack-api/page/items/add now each take an
list-id argument. In addition, there are
four new API methods: