I’m working on a small site for Home For the Holidays BB, which is running a christmas tour this year. Since it's a self guided tour I want to include maps, the Google Maps API seems like the obvious choice.
Something weird I'm noticing is the difference in the data provider. When you use regular Google maps the data is provided by Navteq (who provides data for pretty much everyone, including Google Earth) while when you're using the API you get data from TeleAtlas. Now I've been lead down strange routes as often as anyone by Navteq's data, but it's better than the TeleAtlas stuff in my opinion, it places houses more accurately and names streets in better compliance with local sign-age (King Street or Regional Highway 15?).
Once I figure out how to take a screenshot on a mac I'll post a comparison.