Once you've been accumulating a lot of jotts, the inbox starts getting cluttered, and I don't see an easy way of multiple selection and re-filing and archiving jotts to clean up the inbox. Their drag and drop method is nice idea, but limits you to one item per click with the associated HTTP round trip delay.
They could use some keyboard shortcuts.
I think rememberthemilk.com has one of the snappier web UIs that deals with lists.