Apple has announced that it will preview its new iPhone 3.0 software upgrades on March 17th next Tuesday. This also means that the new iPhone 3.0 will not be available immediately on the same day. Apple has also promised to release a new SDK along with the new OS version. Details of the upcoming features are unknown at the moment, iPhone users are expecting new features like MMS, copy & paste and iPhone tethering for internet access. Our sister site SlashGear will be doing a live blogging on the event, check out http://live.slashgear.com on Tuesday for live report.