Apple has released the 5th beta of iPhone SDK 3.2 (10M2148) for registered iPhone developers at the iPhone Dev Center. iPhone SDK 3.2 has been mainly aimed for iPad app development.
The Apple iPad will be released April 3rd.
Via iPhone Alley.
Arabic version of this post on SaudiMac.net.
Will this os will be available for iPhone
not at the moment, there is no iPhone OS 3.2 beta for iPhone, only iPad.