Google Maps is turning into one of the best map system ever with the new transit directions available online as an upgrade to Google Maps.  Add GPS to Google Maps and you have a very powerful maps device.  Anyone using windows mobile with Google Maps installed, should be able to access Google Transit to find their way through, currently only New York transit.

But wait… did you know there has already been a free transit solution available?  iMetro by nanika.net has offered full metro maps for a long time and accessible by pc, iPhone, and windows mobile.  By visiting iMetro (link) you’ll get a full listing of how to get from point a to point b, all by public transportation.

New York Transit with iMetro

iMetro however doesn’t offer the visual layout that Google Maps offers. iMetro can also be used offline with Windows Mobile, something you can’t do with Google Maps.