[whpalmer4]

You can set up your own WiFi net when you want to sync, with no other equipment than your MacBook. In System Preferences->Network, make sure you have the Show Airport status in menu bar box checked. Then, when you need your own network, just go to the little Airport menu (looks like 4 concentric arcs in black and gray), select Create Network... and pick a name for your Computer-to-Computer network. Launch OmniFocus on both devices, have your iPod join the new network, and sync. Go to the Airport menu again and rejoin your usual network. You can use the Locations feature on the Mac to make this switching of network connections somewhat easier.