[Brian]

As far as we know, only applications from Apple have the ability to sync over the wire. With the exceptions of a few apps that do stuff like hack Safari's bookmarks file on the device, all third party Apps need to sync via a wireless connection.

I think your best option is to set the Mac up to share the phone's wireless connection with your iPod Touch. The Mac would talk to the internet via bluetooth, and send the WiFi signals from your iPod over to the phone, as well.

You can find info on doing this in the "Creating a computer-to-computer network" page of the Mac Help material. Does that help?