Airport Extreme won't show My Book Live

Are your WiFi and cable network on the same IP-Range?

Since you can split them, you may want to check this.

Further more, I do understand your rant, but maybe none of the both companies are the culprits?

Sometimes even Apple products need to be configured propperly :wink:

I have a MBL on an Apple Extreme working with no problem via WiFi and cable.

Maybe we should parse your configuration?

cheers