I think we could at least make an installable extra keyboard layout for the arabic.
My only ocncern is that we have two fewer keys in the on screen keyboard than there are usually keys in the arabic keyboards. But I'm sure we can handle those somehow.

Basically, we don't have space for the
http://www.abckeyboards.net/language...ard_layout.gif

Rightmost key on the first alphabet row and we don't have space for the rightmost key on the lowest alphabet row. But those keys can be moved behind shift key.