Provide visual indicators of which graphs have been updated that day
If one is juggling many beeminder graphs, it can be easy to forget if a graph has been updated for the day or not. Currently, checking a graph requires visiting the graph page, waiting for it to render, and then eyeballing the graph or the recent data as appropriate.
It would be lovely if—on the user's goal overview page—a visual indicator (such as a check-mark) appeared on graphs that have had data for that day already entered. This would allow the user to tell at a glance which graphs need tending.

Ooh! We left you hanging on this – we totally do this now, with a check-mark, even!