Unlocked iPhone 4 units sold by the Apple Online UK store are now dispatched within 1 week, a second reduction from 2 weeks which was reduced from the usual 3 weeks. The improvement is not as good as the US store though as they reduced it to (1-3 days) from (5-7 days).
This is a good time to buy an iPhone 4 and ship it to Saudi Arabia using Aramex as these iPhone 4 models have FaceTime enabled. The model numbers of these units are: MC605B and MC603B.
Importing an iPhone 4 is also a good alternative to local scalpers who raised the iPhone 4 prices again, touting FaceTime as an advantage.
Arabic version of this post on SaudiMac Arabic Edition.