What I think is import for the new engineers is to have a list of those phone numbers handy. Lauren Nowlin was nice enough to import her list of every noc into my Palm. I think it would be wonderfully useful to make such a Palm list public so every engineer can have it handy everywhere they are.
Or how about just text. I've often thought it would be a good idea to share the various phone numbers we all have -- the only problem is keeping the list up to date. As these numbers change quite a bit, some verification needs to be put in place. Perhaps a text based list, in a given format, with a "last verified" date included. That would give the person using it some expectation of the validity of the number. If each contributor of a number would verify the numbers before contributing them, the work would be distributed, and would stand some chance of making the idea a reality. If the format (schema) is set to something specific, people can do what they want with the information -- push it on to pilots, etc.