Data Rights

What kinds of rights should we have when dealing with systems that gather our data?  Does this mean we should not accept agreements that do no make this clear?   Thoughtful piece in ReadWriteWeb  It would be useful to have data access rights stated in in terms of these categories.  Simply put, give us access to our data, enable us to use it for our own purposes, and give us ultimate control of that data.  There is a long path to having all of that consistently.  It is also more than just rights for data portability.