I’ve had my Kindle 3 now for over a week and I promised my sister that she would get my old Sony PRS600 eReader. The only problem was that it was registered to my account with Adobe Digital Editions. You need to do this to be able to read DRM protected ebooks. For my sister to be able to register the eReader I have to (I assume) unregister it from my account. The only problem was that I couldn’t find how you can do that. Not on the Adobe website or via Google.
I ran into another problem: you cannot email Adobe. I you have a question you have to ask it via a chat, and nobody was available each time I checked in the last week and a half. Until this morning, someone from Adobe was finally available.
In the end it’s really simple to unregister an eReader yourself, I don’t know why they don’t put it on their website. You plug your eReader into your computer, start up the Adobe Digital Editions software, wait until it sees the reader, press CTRL + SHIFT + E, then you can select the reader and unregister it.