From LivePIM Software:
If you are using the Tungsten T3 or Tungsten E, SwitchSync would be a useful application.
You can use SwitchSync to synchronize the Tungsten T3 / E Palm PIM applications, the Contacts, Calendar, Tasks and Notes with both Palm Desktop and Outlook. And it is not a bad idea to backup your Outlook data to the Palm desktop even you are using Outlook only.
If you are using other devices while also want to synchronize with both Palm Desktop and Outlook, please check out the standard SwitchSync.