Apple iOS 4 Firmware Update for iPhone 3GS, iPod Touch available for download

Apple has released iOS 4 software update. With over 100 new features, the free iOS 4 Software Update for iPod touch lets you do even more amazing things. With Multitasking support, now you can run your favorite third-party apps — and switch between them instantly — without slowing down the performance of the foreground app or draining the battery unnecessarily. There's also iBook, more than a great ebook reader, it’s also an amazing place to browse and shop for books, day or night.

Apple iOS 4 Features
+ Multitasking support for third-party apps*
+ Multitasking user interface to quickly move between apps
+ Support for audio apps to play in the background
+ VoIP apps can receive and maintain calls in the background or when device is asleep
+ Apps can monitor location and take action while running in the background
+ Alerts and messages can be pushed to apps using push and local notifications
+ Apps can complete tasks in the background
+ Folders to better organize and access apps
+ Home screen Wallpaper*
+ Mail improvements
+ Unified inbox to view emails from all accounts in one place
+ Fast inbox switching to quickly switch between different email accounts
+ Threaded messages to view multiple emails from the same conversation
+ Attachments can be opened with compatible third- party apps
+ Search results can now be filed or deleted
+ Option to select size of photo attachments
+ Messages in the Outbox can be edited or deleted
+ Support for iBooks and iBookstore (available from the App Store)
+ Photo and Camera improvements
+ 5x digital zoom when taking a photo**
+ Tap to focus during video recording**
+ Ability to sync Faces from iPhoto
+ Geo-tagged photos appear on a map in Photos
+ Ability to create and edit playlists on device
+ Calendar invitations can be sent and accepted wirelessly with supported CalDAV servers
+ Support for MobileMe calendar sharing
+ Suggestions and recent searches appear during a web search
+ Searchable SMS/MMS messages**
+ Spotlight search can be continued on web and Wikipedia
+ Enhanced location privacy
+ New Location Services icon in the status bar
+ Indication of which apps have requested your location in the last 24 hours
+ Location Services can be toggled on or off for individual apps
+ Automatic spellcheck
+ Support for Bluetooth keyboards*
+ iPod out to navigate music, podcasts and audiobooks through an iPod interface with compatible cars
+ Support for iTunes gifting of apps
+ Wireless notes syncing with IMAP-based mail accounts
+ Persistent WiFi connection to receive push notifications*
+ New setting for turning on/off cellular data only**
+ Option to display the character count while composing new SMS/MMS**
+ Visual Voicemail messages can be kept locally even if they have been deleted from the server**
+ Control to lock portrait orientation*
+ Audio playback controls for iPod and third-party audio apps*
+ New languages, dictionaries and keyboards
+ Accessibility enhancements*
+ Bluetooth improvements
+ Better data protection using the device passcode as an encryption key* (Requires full restore)
+ Support for third-party Mobile Device Management solutions
+ Enables wireless distribution of enterprise applications
+ Exchange Server 2010 compatibility
+ Support for multiple Exchange ActiveSync accounts
+ Support for Juniper Junos Pulse and Cisco AnyConnect SSL VPN apps (available from the App Store)
+ More than 1,500 new developer APIs

You download the new Apple iOS 4 Firmware Update for iPhone 3GS, iPod Touch via iTunes.