Here's a relatively quick application to list all your devices via the Web Plugin system of Indigo...
The application will display:
* Device Name
* Description
* Insteon Address
* The Device Type
* The Device's Firmware level
For example:
How about some feedback, and suggestions on what else you might want to see?
http://www.schollnick.net/wordpress/2009/02/indigo-remote-device-listings/