You may not be aware that you can tap the screen to focus the camera and adjust the light balance to better show the tapped area.  Also, when you tap the screen, you see the zoom slider appear along the bottom.

1. Tap the Camera icon.
2. Tap the screen anywhere to focus the camera and adjust the light balance for that area.  (See figure).
3. Tapping inside the house adjusts the light balance and focus for the inside.
4. Tapping through the window to the outside, adjusts the focus and light balance to better take an outdoor picture.
5. Slide the zoom slider bar to adjust the zoom level.

TIP: This same 'touch to focus' works when you are taking videos as well!

Source: Chapter 21: iPhone Photography,
 iPhone 4 Made Simple

Now that you can take great pictures and videos with your iPhone, you will want to be able to share them with your friends and loved ones.  It's easy to do.

1. Tap the Photos icon.
2. Tap any album to open it.
3. Tap a photo or video to view it.
4. Tap the photo just once to bring up the controls along the bottom and tap the Send button in the lower left corner.
5. Now you can select from the following:
- Email Photo (Send as part of an email message)
- MMS (Send as part of a Multi-media message to a phone number)
- Send to MobileMe (you will only see this if you use MobileMe)

Source: Chapter 21: iPhone Photography, iPhone 4 Made Simple

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