It took forever to release it but finaly Microsft released it: Business Contacts for Pocket PC. It allows you to synchronize your business contacts and a subset of your communication history to your Microsoft Windows Mobile Pocket PC device.
While on the go, you can make changes to your business contacts and later synchronize the changes made with the Microsoft Office Outlook 2003 with Business Contact Manager database.
The download contains two parts: a sync provider for Microsoft ActiveSync and a program for the Microsoft Windows Mobile Pocket PC, Windows Mobile Smartphones aren't supported yet.
I've played a lot with Outlook 2003's Business Contact Manager when I got the first Beta but noticed pretty soon, that I would access it most of the time from my Pocket PC (which wasn't supported back in 2003). Therefore I've stopped to use it. Maybe I will awake it again, since the Pocket PC is supported now. Wonder when and if a Smartphone version will follow.
The download is available free of charge from Microsoft and supports several languages.
Cheers ~ Arne