TakItWithMe - Embedded Google Earth Beta
Live from Google I/O
1. Enter My Maps or KML URL [?] and Click Load:

Embedded Map Preview
Nov 26,2008 We have encountered an unexpected issue with our URL's. If your embedded map is no longer working, please change the text url=http:// to url=http:%2F%2F and your existing links should be fixed.

Use this tool to embed Google My Maps or Google Earth KML directly into your blog or website using the new Google Earth 3D Plugin. Simply copy a My Maps / KML URL into the form and click 'Load Preview' and then copy the resulting code into your website where you'd like your map to appear. This tool is in BETA release and we will be adding new features quickly so check back often.