As with web applications and even devices are getting smarter and smarter every day I'm getting concerned that who will control my online data and how this entity will use it.
To mention some of the technologies today:
iPhone 3G GPS geo targetting, there are applications that gather data about your location.
Semantic search. By simply searching for a name, username, e-mail address the search engine can cross reference that information, theoretically it could know your adress, city, country you live in, which restaurants you frequent, etc.
My question is that is there any legal entity that controls how third party services could use your data?