Originally Posted by Lynx-lynx
You can't just read a DRM protected book on your ereader unless it's an ereader connected to the store that you bought the ebook from,
erm... Not true, at least not in my experience.
When I got my Kobo a month or so ago I purposely tested this, authorizing my reader and then dragging / dropping epubs I had purchased from Sony and B&N. They all opened without any problems. I didn't even use ADE to load them, just dragged the epubs from the download file.
UPDATE: Well, tested this again, and I'm half right, Sony epubs work fine, but the B&N files did not.