I have also been thinking about .Mac recently, but not that it should be revamped, rather just improved slightly. You'll notice the data send to .mac from Apple programs is accessable and editable. As a developer currently trying to add some .mac magic into my own app i'd love it if I could add some kind of web-based frontend to the data stored on the apple severs. That way my end users wouldn't have to have a mac say at work to use the app. They could add data/records/anything into the mix that would be sync'd to their mac by the time they got home!