My Chumby transit widget
I just got a Chumby, primarily to let me create this widget to run on it: it’s a clock that displays predictions of when the Portland Streetcar will be passing the stops nearest my home. Green dots are northbound; red are southbound. Armed with this, I know exactly when I need to leave the house to avoid a long wait.
(I wrote this using OpenLaszlo - I started with a “clock” demo of theirs, and added some dots and a bit of data retrieval.)