Apple announced today that the new version of its iOS software — which powers the iPhone, the iPad, and the iPod touch — will be available to the public on October 12th.

Among other things, the new operating system deeply integrates Twitter throughout the iOS experience.

This announcement coincides with the imminent launch of new iPhone hardware. The iPhone is currently the world’s most popular smartphone and the iPad is the most popular tablet computer. 90% of the Fortune 500 companies are currently testing or deploying the iPhone, and 92% are testing or deploying the iPad, according to Apple CEO Tim Cook.

The added Twitter integration will make it easier for iPhone and iPad owners to tweet updates to their friends, and those updates could potentially be about your business.

Additionally, iOS 5 includes a new system for managing notifications like text messages, sales available through apps, or location-based pop-ups alerting friends that they’re near daily deals and other things of interest. It also adds many new features to the Safari mobile web browser and the device’s email functionality and camera.

Other features include Newsstand, a marketplace for digital magazines similar to iBooks for books, a new reminders system, and support for Apple’s iCloud service, which lets iPhone and iPad owners store apps, music, videos, and other media on the internet and download those things automatically to any iOS device. iCloud will also launch on October 12th.