Hoo boy, the OP has set the cat among the pigeons here.
On this forum, DRM is intrinsically evil. 99 percent of the folks here believe that and preach that and if you dispute it, expect to be called an industry shill, a tool of the publishing industry, a moron, etc.
If you are an average user with the Kindle, I would suggest that you not worry about DRM. Buy good ebooks, enjoy reading them on your device, and live a nice life.
You have been told above that you can't lend ebooks. That is false. Amazon has recently allowed limited lending privileges for many titles. Several websites and Facebook pages have sprung up enabling the anonymous lending of thousands of titles. Those websites may not exist for long but even without them, you can lend some ebooks.
You have been told that you can't share your ebook with dear old dad. Well, wrong again. Your Kindle Licensing Agreement allows you to share your library among 5 machines. Simply set up your account on dad's machine, and you're good to go. You may have to move your bondage literature collection to the Archives to avoid shocking dad
, but hey..
You have been told that you can't take your Kindle books with you if you move to a new dedicated ereader. Two simple solutions here:
1.Don't buy a dedicated ereader that can't read your Kindle books. Your choices here are broad. You can buy a general purpose tablet (eg. Ipad), a PSP (eg Ipod touch), or a smartphone (eg Blackberry)You then install the Kindle Reading app, and you're all set.
2. Just continue reading your Kindle books on your old device (which presumably didn't vanish in a puff of smoke when you decided to move to a new device. If it did so vanish, used Kindles are pretty cheap these days on CL or Ebay.
Follow these steps and it's 90 per cent likely that you will live a life untroubled by DRM. Cheers,