iPhone OS 4

iPhone 3GS and 3G owners are expecting the iPhone OS 4 release from Apple today. Renamed iOS 4, the new firmware adds 100 new features including multitasking, folders and more. Apple watchers are predicting that the company will make the update available on its servers by 10 am Pacific time (1 pm EDT).

Demand is sure to be high as millions of devices, including the iPod Touch, are eligible to receive the operating system upgrade for free. Users will certainly flood Apple's servers with requests, much like the iPhone 4 pre-order swamped AT&T and Apple. iOS 4 requires iTunes 9.2.

Steve Jobs officially showed off the iPhone 4 today at WWDC 2010. He described the iPhone 4 as the "biggest leap" since the iPhone was first released in 2007. Although photos of the new iPhone have been seen already, the design is quite impressive.

Antennas are integrated into the stainless steel frame of the new iPhone and aluminosilicate glass that's 30 times stronger than plastic makes up the front and back surfaces of the device. The iPhone 4 is 24 percent thinner than the iPhone 3GS.