Does anyone know of a third-party replacement for ActiveSync ?

Microsoft has chosen to remove the ability of Windows Mobile 5 devices and ActiveSync 4.x to sychronize files via any network: dial-up, wi-fi, ethernet, etc., only allowing sync via USB, Bluetooth or IR. I have a customer with a large number of handheld devices that are currently syncing files via dial-up. Unfortunately, he can no longer procure PocketPC or Windows Mobile 2.3 devices, only Windows Mobile 5 devices - which can no longer sync.