Here is a script I wrote to convert kismet logs to google earth. I realise there is a php one here, but I wrote my own because:

• I don't particularly like php...sorry :)
• The signal strength data wasn't mapped onto google earth
• The APs were not placed at points of max signal strength, and so didn't really make sense.

This software is distributed under the GPL

Checkout the latest code with:

svn checkout http://pykismetearth.googlecode.com/svn/trunk/ pykismetearth