Google has released an official Gmail app for the iPhone, iPad, and iPod touch.
With the Gmail app, you can:
● Receive notification badges for new messages
● Read your mail with threaded conversations
● Organize your mail by archiving, labeling, starring, deleting, and reporting spam
● Keep track of important messages with priority inbox
● Auto-complete contact names as you type
● Send and receive attachments
● Search through all your mail
You can download Gmail from the App Store for free.