Originally Posted by sirmaru
Each device and app has a slightly different email address. Go to the Manage Your Kindle Page on Amazon and copy and paste all those addresses into the CC box in your email with the eBook.
When I did this I received three copies of the same book (sent to Kindle PPW, iPad and iPhone) in the cloud.
Now I just send it to the K PPW's email address. It becomes available in the cloud for all registered devices except for the Kindle DX
Oh, and when I look at "Archived Items" on the Kindle DX the only books that are displayed are the purchased ones. None of the uploaded ones are available.