Hi!
I've got a Kindle Keyboard since september 2010, and I'm using Calibre to download convert & send news to it since then (also added a recipe for my local newspaper).
I've got a brand new Kindle 4, so I gave my Kindle Kbd to my wife, then added the second email address to "Sharing books by email" preferences. That means both devices get the same news (some daily, some weekly, some monthly)...
The question is... could I choose which news have to be sent to the Kindle 4, and wich ones have to be sent to my second Kindle? AFAIK it's not possible (read the FAQ and help topics)
TIA & thanks for your great work!