If you're aren't ready to upgrade to Windows Vista and Windows Mobile Device Center just yet, then it looks like you're stuck with good old ActiveSync for synchronizing your Windows Mobile PDA or smartphone with a computer.

Well, good old ActiveSync just got a little less old. After a few months of beta testing, Microsoft has officially launched ActiveSync 4.5. So what does this upgrade offer, other than continued Windows XP compatibility?

• Speedier USB connection between your PDA and PC
• Stay connected to a wireless or cellular network while connected to a PC (allowing you to receive VoIP calls while connected to a computer)
• Enroll for device certificates from the PC, allowing Exchange sync with servers that require certificated based authentication
• A troubleshooter utility has been integrated into the program to scan your PC and identify devices that could be causing connection problems

[via MoDaCo]