[SirFlash]

Personally, i would just create a 'sticky' post that always stays on the top of a forum thread, and keep a thread with all this information referenced somewhere appropriate for easy access. That's a quick and easy way to do it, but may not appear professional enough for your liking.

If that's the case, you can integrate third-party scripts into vbulletin by making vbulletin "custom pages".

So if vbulletin doesn't have a script you need, you can most likely find a suitable phone number / address book software (like a php/sql package somewhere) to make it appear in an iFrame of your custom page. Or you could simply make your own HTML files with this info and put it in a custom page accordingly (no iFrame would be required in this scenario). Whatever is the best solution for your needs, there's plenty of ways to do what you describe.

I don't know of any vbulletin phone # / address book add-on software, but fortunately it shouldn't be needed.

Good luck!