According to the specifications of the new 3G iPhone. The iPhone will not have any Arabic language support at all.
Language support for English, French, German, Japanese, Dutch, Italian, Spanish, Portuguese, Danish, Finnish, Norwegian, Swedish, Korean, Simplified Chinese, Traditional Chinese, Russian, and Polish
Which is odd considering that the iPhone should be released in 3 Arabic speaking countries; Egypt, Jordan and Qatar. And there will always be a potential for other Arabic speaking countries that have an interest for the iPhone.
Over 200 million speak Arabic compared to any of the other languages listed, Arabic is a major language. Will Apple release a late update to add Arabic support or will they just ignore the Arabic language like they did with the Mac OS (first party Arabic localization) and iPod all these years?