My company has 300 people and we have 20,000 contacts in a custom database.  
We'd like to move these contacts to Outlook and share them with all 300
people.   I know I can share ALL 20,000 contacts to all users, but most users
only need to see 500 to 1,000 contacts.   My question: is there a way in
Outlook 2003 or 2007 to only show selected contacts to each user?  The idea
is that the user would open Outlook and see only the shared company contacts
that they want, not the entire company list.   We use XP and Outlook 2003.  
Would Sharepoint do this?  Any help would be greatly appreciated!