Musterfy was designed to let users take control of their own homepage, without extracting lots of information from the users.
All the information collected at the point of registration is kept private, and is only required for logging in or for notification purposes. None of this information is supplied to any other third parties.
The Twitter widget requires your Twitter username and password. This information is recorded for express use of the widget. This information is not available for any other reason.
The Facebook widget uses the Facebook connect api which will only record the Facebook User ID to link the Widget to Facebook. This widget is only available to the logged in user. This information is recorded for express use of the widget. This information is not available for any other reason.
All widgets can be specified to be visible to all, friends or just yourself. Only widgets that are visible to all are visible to any user not logged in.