There's still a few hurdles to consider for such a tool as Clearance:
- Who owns the data if it's being collated for Joomla!
- How to ensure people's personal information isn't being misused. This also applies currently to personal information across the entire official Joomla sites (e.g. shop, forum, Code). One hundred and ten thousand users is a marketer's wet dream (as seen by the Ansearch debarcle within Mambo).
- How to ensure that the data concerning a person is factual, as some enterprise ERP/CRM packages I've worked with have significant problems with duplicate data.
- How to ensure that users can access that information and have it removed under Freedom of Information so that their privacy remains intact.