I've noticed a lack of arabic feeds, and only one guy so far has requested for some on the forum. However a google search has shown that there are a few people who are interested in having arabic feeds included.
So I have started making some, so far I've done one for Al-Ahram (an Egyptian news paper company).
I've uploaded my recipe to launchpad:
https://code.launchpad.net/~hazrpg/+junk/ArabicRecipes
The problem I'm having at the moment is that I can't seem to get rid of the twitter or facebook html tags.
Also, it doesn't seem to handle RTL for arabic very well. Some advice would be most welcome.
Much thanks, and keep up the good work with Calibre guys.