We recently added KML support to every Brightkite place page. To find it, just replace the .rss with .kml on the place page RSS feed.
For example: http://brightkite.com/places/77de68daecd823babbb58edb1c8e14d7106e83bb/objects.kml
Over the past few days we have been having a lot of fun visualizing live Brightkite activity by plugging network KML files into Google Earth.
You can visualize Brightkite place feeds in Google Earth as well, here’s how:
Download the following Brighkite Universe KML network file and open it in Google Earth:
brightkite_universe.kml
Here is another example showing activity from the Colorado place page:
brightkite_colorado.kml
We recommend only viewing one network feed at a time and changing your Google Earth “Fly Speed” to around 1.3.