In response to "blogdiva@culturekitchen.com" blogdiva@culturekitchen.com:
And why are the Drupal Mailing lists on it?
Nabble is a list/forum aggregator. I assume that Drupal is on it because the drupal mailing lists are public, and there's nothing to stop them from including it (much the same way that Google archives all public web pages).
It's also possible that someone in the Drupal community knows someone at Nabble, or even works for Nabble.
Is there a problem?