According to iphonehacks.com the new iOS 4 will be available for download on the 21st June 2010 and from what I have seen and what is going to be on this new OS I can’t wait to try it out.

Here are some sweet additions to the update that are coming out these are my favs..

Multitasking:

iPhone users will finally be able to run iPhone apps in the background. To achieve this Apple will be offering developers seven multitasking services, which will allow their iPhone app to run in the background while preserving performance and battery life.

Folders:

Users will be able to organize iPhone apps on their iPhone home screen into folders. Users will be able to drag and drop apps into folders.

This means iPhone users will be able to install 2160 apps instead of the current limit of 180 iPhone apps.

Better Mail app:

You will now be able to see messages from multiple email accounts in a unified inbox. iPhone OS 4.0 will also allow you to organize messages by threads, and even be able to open attachments in third-party iPhone apps.

iBooks:

iBooks app will be available on the App Store for iPhone and iPod Touch users so they will be able to browse, buy, and read ebooks.

Cellular Data Toggling: You have an option to toggle cellular data on or off. (i think this one will be most interesting to see if it will be available in Australia aswell)

iPhoto Syncing: iPhoto users can sync their photos to the iPhone via Events, Faces and Places. This will work for the iPad too.

Lyrics Data Toggling: A new global toggling option gives you the ability to turn the display of lyrics on or off.

Photo Resize Option: Users sending large-size image files via email can choose to resize the photo on the go by selecting from the four different file size options.

Add Playlist: The current on-the-go playlists will be replaced by the ‘Add Playlist’ option in iPhone OS 4 that will be automatically synced back to the users’ iTunes account.

Location Services For Apps: You can enable or disable location services for each location based apps via Settings -> Location Services. Also, you also get visibility on the apps that have most recently accessed this information using the compass arrow icon.

Email Threading: You can organize emails by thread in the Mail app just like in Gmail. Email threading option can be turned on or off via Settings -> Mail, Contacts, Calendar and turn on or off the ‘Organize By Thread’ toggle.

Longer Passcodes: Passcodes will no longer be limited to just 4 numbers. You can set a more secure alphanumeric and longer passcode for your iPhone. You can currently use the iPhone Configuration utility to achieve this.

You can read what other features will be available when the new iOS is release by visiting iphonehacks.com