don't get me wrong, I am not saying that you have to buy from amazon. All I am saying is that DRM is not a reason to avoid the kindle (unless you believe that it is wrong to purchase any device that supports DRM, even if you never use it)
I don't see amazon as being control freaks about the kindle. yes, they have done things wrong in the past (the entire 1984 fiasco), but I believe that they have learned their lesson about this sort of thing.
that's the only think that I see as being 'control freaky' about the kindle. they do not have drastic barriers to loading user software on the devices (they don't go out of their way to support it, but the update process is straightforward and the amazon updates are smart enough to not risk bricking devices if the owners have applied non-standard updates to them)
the only other thing I could see them being accused of being controlling about is the use of the Internet connection, but since that costs them money for the airtime, and their only real limit is that you must use http/https through their proxy servers, it doesn't seem unreasonable to me.