Details are scarce but it appears Google will index only location and content of the markers and/or infowindows that are displayed on hundreds of thousands of mashups. There is an option to opt out from this arrangement and Google has indicated it will apply the following rules:
- We only index data from maps that have been viewed by many unique users. For example, maps only viewed by you and a few friends won't be indexed.
- If your page is protected by robots.txt, we will not index your content.
- You can opt-out of the logging by specifying "indexing=false" when loading the API.
- If you are a Maps API Premier customer, we will not index data from your maps, unless you opt into indexing by passing in "indexing=true".
The exact day the new arrangement will take effect will be announced in due course.
First spotted on Google Maps Mania