Just to make sure everybody has seen it, Activesync 4.1 has been released: 

ActiveSync 4.1 is the latest sync software release for Windows Mobile 5.0 devices.

Microsoft ActiveSync provides a great synchronization experience with Windows-based PCs and Microsoft Outlook right out of the box. ActiveSync acts as the gateway between your Windows-based PC and Windows Mobile-based device, enabling the transfer of Outlook information, Office documents, pictures, music, videos and applications from your desktop to your device. In addition to synchronizing with a desktop PC, ActiveSync can synchronize directly with Microsoft Exchange Server 2003 so that you can keep your e-mail, Calendar, Notes, and Contacts updated wirelessly when you’re away from your PC.*

New features include:
  • New partnership wizard makes syncing easier
  • Faster transfer of data files including media
  • Ability to sync photos assigned to contacts from Outlook on the desktop

ActiveSync 4.1 supports PC sync via USB cable, Bluetooth, or infrared connection.

More information and download can be found here.