Another good one is the stop-motion animation 'toon, The Easter Bunny is Comin' to Town. It totally invents a false mythology trying to explain Easter traditions like why people paint eggs and so on, but it still is a fun diversion with some catchy songs and Fred Astaire voicing the narrator mailman. It holds up well with some of Rankin/Bass Productions' other stop-motion classics, not as good as the Christmas classics but better than their previous Here Comes Peter Cottontail.
There are a bunch of other Easter cartoons out there, but most of them are pretty boring for grown-up tastes, like The Easter Chipmunk and The First Easter Rabbit. Only a few cartoons try to tell the religious messages associated with the holiday -- VeggieTales: An Easter Carol is one.
Do you know of any others?