Yahoo! Messenger for iPhone

Yahoo! Messenger for iPhone.
Take your contacts on the go
Instant message with your Yahoo! Messenger contacts wherever you are
Share away
Share photos, emoticons and links, right from your iPhone
Show off and Stay in control
Show yourself as available, busy, or invisible, and update your status to let your friends know what you're up to.

Features:

Instant Messaging: Send text messages in real-time to your friends on Yahoo! Messenger.

Photo Sharing: Share photos from your desktop or Flickr, then discuss them over IM while you and a friend view them together.

SMS (Text Messaging): Send text messages from Messenger to your friends mobile phones for free.

IM with Friends on Other Networks: IM with friends who use Windows Live™ Messenger, Reuters Messaging, and Lotus Sametime — right from Yahoo! Messenger.

Contact Search Bar: Quickly find a contact to IM, call, SMS or more.

Yahoo! Search: Start a web search right from your Yahoo! Messenger window.

Stealth/Privacy Settings: Make yourself appear online to some friends, and offline to others.

Message Archiving: Maintain a private archive of your IM conversations.

Tabbed IM Windows: Reduce desktop clutter by organizing multiple conversations into a single window.

Emoticons: Express your feelings with these animated, smiling faces.

Avatars: Represent yourself with a stylized, graphic image where you can choose the hair, clothing and more.

Display Images: Display an image to represent yourself to your friends.

Custom Status Messages: Tell your friends what you're doing, seeing or feeling by customizing your online status message.

Customizable Fonts & Colors: IM with a font, color and style that suits your personality.