[RuleRulez]

The steps for setting up OmniFocus via .Mac:
0) Close Omnifocus
1) Locate omnifocus.ofocus in your Library/Application Support/OmniFocus/
2) Copy this file to your iDisk (suggestion: put it in a OmniFocus folder)
3) Double click on this file, stored in your iDisk: Omnifocus will open and use this file to write to
4) After a /Mac sync (most probably automatic) the same file will pop up on your other computers.
5) Having OmniFocus installed, a double click on this file will open it and you can set up the webserver.