Update: looks like me.com redirects to https by default now, so MobileMe is no longer blocked in Saudi Arabia!.
The CITC did not provide a reason for this block.
Right now only http://www.me.com seems to be blocked. You can access the secure page on a desktop browser: https://www.me.com/ but if you tried to go there using an iPhone or an iPad you would be forwarded to:
To help get this page unblocked:
You can find the author of this post on twitter: @khaled.
Arabic version of this post on SaudiMac Arabic Edition.
Remember to visit We Want Apple Saudi Arabia petition and spread the word.