Apple iPhone/iPhone 3G (User manual) - Manual (Page 72)

 To email the person, tap Contact Info, then tap an email address.
Follow a link in a message: Tap the link.
A link may open a webpage in Safari, initiate a phone call in Phone, open a
preaddressed message in Mail, or display a location in Maps. To return to your text
messages, press the Home button and tap Text.
Add information in a link to a contact, or see the contact information of the person
associated with the link: Tap
next to the message.
Add someone you’ve texted to your contacts list: Tap a phone number in the Text
Messages list, then tap “Add to Contacts.”
SMS Preview
By default, iPhone displays a preview of new text messages when iPhone is locked or
you are using another application. You can turn this preview on or off in Settings.
Turn SMS Preview on or off: In Settings, choose General > Passcode Lock and tap
Show SMS Preview.
Alerts
Set whether an alert sounds when you get a text message: In Settings, choose
Sounds, then turn New Text Message on or off.
Important: If the Ring/Silent switch is off, text alerts won’t sound.
Display new text messages when iPhone is locked: In Settings, choose General >
Passcode Lock and tap to turn “SMS preview” on.
Calendar
Calendar lets you view your events in a continuous list, by day, or by month. Sync
iPhone with the calendars on your computer. Make, edit, or cancel appointments
on iPhone, and have them synced back to your computer. If you have a Microsoft
Exchange account, you can receive and respond to meeting invitations.
Syncing Calendars
You can sync Calendar in either of the following ways:
In iTunes, use the iPhone preference panes to sync with iCal or Microsoft Entourage 
on a Mac, or Microsoft Outlook 2003 or 2007 on a PC when you connect iPhone to
your computer. See “Syncing with iTunes” on page 7.
72 Chapter 7 More Applications