Though the previous slides show the biggest changes in iOS 4, you'll find small enhancements in the native apps, too. For example, in the Safari browser, you can now choose from Google, Yahoo, and Microsoft Bing as your default search provider. The browser also displays word suggestions as you type in the search box.
Apple has bumped up the Notes app with wireless syncing, so now you'll always have your notes in sync. This feature works without cables, and it creates a folder in your inbox for over-the-air syncing.
If you keep birthday information with your contacts, you will be pleased to find that the Calendar app now has a place to store that data alongside your schedule. Lastly, heavy typists will appreciate the added support for most Bluetooth-enabled keyboards.
Thinking about upgrading to the iPhone 4? Check out our in-depth first look at the hardware and specs of Apple's newest smartphone.