Right now I'm designing an academic online magazine, and I'm looking for
1) an Arabic font to pair with Gill Sans for headlines (light) and sub-heads (reg)
2) an Arabic font to pair with a humanist serif like Scala (it must be a font that supports Greek) in the long copy.
I've been doing some research, and came across some stuff that I liked, but I know really only a little bit about Arabic typography (I'm really not a typography specialist anyway), so I thought I'd try to get some professional's opinion (besides my partner's, whom I'll pester with my questions tonight, too).
I especially enjoyed reading this discussion: http://typophile.com/node/92658