iPhone OS 3.0 details

[becomingwater]

App and developer functionality (more here)

Peer-to-peer connectivity over Bluetooth for gaming and other info-swapping.
Paid apps will have the potential to be subscription fee-based, and can include optional paid content that can be bought from right inside the app.
Developers can now build apps that call out to Google Maps, and can also finally bring Apple-blessed turn-by-turn to the phone.
Devs can also connect with hardware accessories over in their apps now, such as a blood pressure monitor -- or perhaps a keyboard? Connectivity works through the dock connector or over Bluetooth.

Long-promised push functionality will at last be included, but apps won't run in the background.
Developers can add streaming video and audio to their apps, along with in-game voice use.
General functionality

Cut, copy and paste. At last! You can shake the phone to undo and redo the action, and it works with both text and photos, allowing Mail to send multiple photos at a time. (more here)
MMS, along with forward and delete for multiple messages. (more here)

A2DP stereo Bluetooth.
Unlocked Bluetooth functionality on 2G iPod touch. (more here)
Spotlight has been added to a new home screen page to the left of existing pages, allowing for universal search on the phone. (more here)
Tethering is built into 3.0, and Apple will work with carriers on that -- who will have the last say on its implementation, most likely.
App Store will be available in 77 countries.
Parental controls for TV shows, movies and App Store apps.
Auto-login for WiFi hotspots.
Apple apps

A new app called Voice Memos which lets you record notes and reminders.
A revised Stocks app, with news stories and a landscape view.
Landscape view available for Mail, Text and Notes.

CalDAV support has been added to Calendar, along with subscriptions support in the .ics format.

Apple's major apps have all been expanded with search functionality.
Note syncing to Mac and PC.
YouTube account support.
Form auto-fill.
Phishing protection.
Shake the shuffle iPod playback.

http://www.engadget.com/2009/03/17/a...iphone-os-3-0/