Sharing contacts with Outlook 2003

We have a support team spread across the globe that needs be able to share their contact information easily. I am looking to be able to do a one time consolidation of all team member's contact information, make that consolidated copy available on a shared location (can be on a network share) and then have the team members synchronize their PDAs to this shared version of the contacts on an ongoing basis.

I do not have access to the exchange server to do this. I have been looking all over and have not yet been able to come across a way to do this.

Appreciate any suggestions.