Check out the products from BeBook - they support many popular eBook formats and don't have any way to exercise complete remote control over the device. They do support Adobe Digital Editions DRM, but the device is happy to read unencumbered formats. Based on free software, their GPLed code is available from the support section of their website.
The BeBook products are actually the most popular line of ebook readers in the world - just not in North America where the Kindle is most popular. Until recently, they only had higher-end readers that were more expensive (~$300), but they've recently released the BeBook Club which is down in Kindle's price range ($150).
The main problem is that they don't retail in North America. They can be ordered online and will ship across the Atlantic - it's expensive, slow, and 100% worth not buying a Kindle.