News from DevTeam:

iPhone 3.0 OS is jailbreakable on all devices. It’s just those using 3G yellowsn0w that have to show some restraint and wait for PwnageTool to create a custom IPSW that avoids the baseband update. If you are using yellowsn0w, do not update or restore to iPhone 3.0 firmware.  You will lose yellowsn0w and find yourself unable to revert the baseband to get it back.

Cydia has been updated to version 1.0.2797-45. However some users report crash immediately after the refresh the sources. The potential app that Cydia has conflict with is Rock Your Phone.

Among the changes in Cydia is a beautiful feature that allows you to install multiple packages at once.

This video shows almost all new features of iPhone OS 3.0 on a regular iPhone 3G:

A new version of the YouTube app due in iPhone 3.0 will let you log into your account and see subscriptions, playlists, and history. Below is also a photo of the iPhone's general preference pane thrown in for good measure. There are reportedly few changes in the settings.

via appleinsider

A new version of Apple's Camera app shows you the last photo you snapped in the lower left-hand corner of the application. Meanwhile, the new Photo album app allows you to copy, delete, or share multiple photos via email.

via appleinsider

Among the apps gaining true landscape mode with a landscape keyboard are Mail, Stocks, Notes, and Messages:

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Spotlight search is accessible by flicking the iPhone's home screen to the right (as if there was a home screen to the left). In addition to serving as a global search app, it can also act as a quick application launcher.

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Apple's new Voice Memo application lets you record voice memos for yourself, which can then be trimmed and sent to friends, family, or coworkers via email of MMS.

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One cool feature of Apple's new MMS "Messages" app is the ability to send messages in the background, which lets you type out your second message while you're waiting for the first to send. It's quite helpful when sending very large media messages:

via appleinsider

Copy and paste in iPhone OS 3.0 works across all applications. Let's take a look at some screenshots to see how it really looks like.

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Sportlight allows users to search for special email message, app, contact, notes, music and other data.