Apple Releases iOS 4.0 for iPhone, iPod touch

As usual we recommend jailbreakers and unlockers hold off a bit before installing new firmware until we can post a tutorial on how to update safely.

This update contains over 100 new features, including the following:

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

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