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Omar, well the traffic from google.com.sa is landing on the root / ... and one thing that "might" be it is Siri now uses Bing and Google for its searchs. probably is affection all google including .com we trying to segmented using referral vs direct vs bing vs anything and there is no evidence yet that the traffic has been "replaced" by another channel

I think there is no easy answer as both have advantages and disadvantages. Rand discusses the different options here: http://www.seomoz.org/blog/international-seo-where-to-host-and-how-to-target-whiteboard-friday I think this is a good start, and from there you will have to make up your mind. We use fr.mydomain.com, and I am happy with the set-up, as it gives you a better URL structure with less sub folders, making the site more easily indexable.

Raven Tools also has a feature that allows you to watch the rankings of keywords. You can also tag events in the results to see what effects certain efforts have on rankings... pretty nice.

well it finally worked out . and yes we rank in google  . thanks .