[Goladus]

I would love for a company that collects personal information and shares it or makes predictions or generates advertising based on it to expose ALL of it to me.

Don't just tell me what you're collecting, and what you do in abstract terms, show me exactly what you have and how you use it. If you have data on the frequency with which I visit friend's profiles, I should be able to see it. If you have data on external links that I've followed, I should be able to see that too. I should be able to see the amount of time I spend logged in, if they track that.

Everything. There should be not one thing that is not available to me through the basic interface. It doesn't have to be on the front page, but there should be an interface and you shouldn't have to be a developer to know how to use it.

I would always favor a company that was open about every piece of data that it held about me, AND everything it did with that data.

[jacquesm]

There are laws to that effect, that they should disclose what they have on you, for instance, in the Netherlands there is a law that is called the 'wet bescherming persoonsgegevens' (law on protection of personal information), which gives you the explicit right to request all information that is kept on you, and to request deletion of such information.

[gcr]

Google's Dashboard seems like a step in the right direction. Maybe not much more than that, but it's better than nothing.

[mrvir]

Creating targeted ads is one thing, identifying you personally is another. FB knows your name, birth date, gender, city. That pretty much singles you out. When combined with all the data about your page views on partner sites that could become privacy threat in the future.