Here’s the app I wrote: http://terribleinformation.org/george/bostonbusmap/
I forgot to specify that it’s pegged to SDK 1.6, but I plan on changing it to 1.5 because apparently a few devices exist which aren’t upgrading further than that, like the Motorola Cliq. See also: http://android-developers.blogspot.com/2009/12/knowing-is-half-battle.html