Google Release Google Earth API + Plug-In
Posted on 30 May 2008.
Earlier this week, Google released a Google Earth plug-in which will let developers make Google Earth 3D applications run within the browser. This is huge for Google and the industry, however, as of today, it hasn’t been added to the Google Maps Flash API. I am sure in due time we shall receive that wish, but until then I would highly recommend toying around with it as it is available in the JavaScript version of the API.
Checkout this video from Google for a preview:
Google’s documentation for the new Google Earth plugin and API are now live.

Hi, do you know how can I use google earth in my flash web page?
Hey elias, here’s a guide that will walk you through the introduction of the new Google Earth API and give you instructions on who to embed it within a website. http://code.google.com/apis/earth/documentation/index.html
Google Earth plug-in is a great product as I’ve used it many times.
is it free
Yes the API is free