Nearly two years later I looked at the package and am still wondering what to do with it :).
Is anyone actually using it? What are people using to store the user preferences?
Also note that the user-preferences package has nothing to do with the user_preferences table.
Last but not least, I would like to have a more generic approach, e.g. object preferences, which I think is called dynamic types 😊.
Or a less generic one for parties, so we can store party preferences.