Far as I'm concerned, "do we have free will" isn't even a well-formed question until you smack it around a little. It's either asking whether our subjective, conscious selves can exert control over our physical selves (which is a stupid question because it posits a http://en.wikipedia.org/wiki/Dualism_%28philosophy_of_mind%29 that we have no reason to think exists), or it's asking whether our actions are entirely determined by forces external to ourselves (which is a stupid question because the answer is totally obvious; if they were, psychologists would have nothing to study).
So, my own conclusion: Our actions are determined by a combination of circumstance and our own physical state, but since our physical state is all we are, this means that our selves do indeed (at least in part, which is all free will should require) control our actions. Thus, if the question of free will is formulated in the only way that even has a hope of being internally consistent, the answer is obviously "yes, we have free will."
The idea that this is an unanswerable question of philosophy doesn't make any sense to me...free will is only a question of philosophy with regard to the proper formulation of the question (i.e., defining "free will") that I've referred to above. Beyond that, it's an empirical question, and an easy one at that: Of course our minds (read: brains) control our behavior. What did you think was doing it, your mom?
*edit*
There is a question that has been in my mind for a while, now. While we have free will, are our decisions really all that free? Even though a person can choose to do something, don't our personalities and values dictate what we do? Don't our mindsets dictate all that we do? Whatever path people choose for anything, they only choose that one path, and if time was rewinded, wouldn't people choose the same path over and over again because they are who they are? Since people only go one way through life, how do we know that we truly have free will? If time was rewinded, I doubt anything could change one's decisions except for an outside influence, but what could be possibly be an outside influence when everything is part of the same world? Since people only choose one path, how do we know that we really have free will?
To frame my viewpoint in the context of the OP a little more, who is this "we" you're positing that doesn't include our personalities, our values, our mindsets, or who we are? Yes, those things determine our actions...but those things are integral parts of our selves (since you included the phrase "who they are," more like the entirety of our selves). So the fact that those are determining factors in the paths we choose is only proof that we ourselves determine those paths...in other words, that we have free will in the only sense that makes any sense.