Tells you your last chance to get home via public transit. Currently a small Python project making use of the Google Maps Directions API; soon to be a Revspace wall display (and possibly small printer for on-the-go train schedules?).
~140 lines of Python, see the project on Github. Probably should've used Haskell, but the Python library bindings were somewhat nicer (i.e. don't require globbing together URLs and parsing JSON).
To be determined. Any ideas?