Perhaps a mailshot to all existing members stating that the site is back up and running, and the login feature is fully restored, etc, will help entice some of our lost members back.
Then as Wiz has suggested more specific interest sections, fire alarms and other bits and bobs!
And just another note, a point was made specifically about firefighters and fire safety inspectors who are used to people automatically listening to them, or thinking they know more than fire alarm engineers. I cant agree with that and actually the vast majority are non fire service
Its important not to try and lay blame at anyone specific group of people, or otherwise. For the most part I think people do get along here and new members are welcomed - i'd be interested to know why Bleve felt that elitism was playing its part.
Perhaps they could also suggest what they would like to see on the forums, as this may also benefit any new prospective members.