Late Tuesday, Apple released new betas of two major upcoming software releases, the upcoming versions of iOS 4.2 and iTunes 10.1.

Per AppleInsider, Tuesday’s release of iOS 4.2 marks the second beta of the software update, due for a public release in November. It is available for the iPad, iPhone 4, iPhone 3GS, iPhone 3G, and second-, third- and fourth-generation iPod touch.

People familiar with the latest iOS beta said it is known as 8C5101C.

The first beta of iOS 4.2 was released earlier this month, and marked the debut of AirPrint, Apple’s new wireless printing standard for the iPad, iPhone and iPod touch. AirPrint will allow iOS device users to print to a shared printer connected to a PC or Mac, or directly to some printers that are compatible with the format.

The previous beta also packed a number of small fixes, including improvements to YouTube and FaceTime. Its release in November will also be the first time iPad owners have had access to the iOS 4 features iPhone and iPod touch users already enjoy, including multitasking and home screen folders.

A beta of iTunes 10.1 was also issued for testing Tuesday, and people familiar with the build said it also supports printing. Just this past weekend, iTunes 10.0.1 was publicly released, bringing improvements to Ping.

If you’ve had a chance to play with either beta, let us know and stay tuned for additional details as they become available.