YAHOO Messenger For Vista (Features)

Communication Instant Messaging: Send text messages in real-time to your friends on Yahoo! or Windows Live™ Messenger.
PC-to-PC Calls: Make a voice call to another Yahoo! Messenger user for free (microphone and speakers/headset required).
Phone Out (PC-to-Phone Calls): Call friends on their regular or mobile phones from Messenger for as low as 1¢ a minute (Phone Out account required).
Phone In (Get a Phone Number for Messenger): Get a new phone number that allows you to receive calls in Yahoo! Messenger (Phone In account required).
IM with Friends on Other Networks: IM with friends who use Windows Live™ Messenger, Reuters Messaging, and Lotus Sametime — right from Yahoo! Messenger.
File Transfer: Send files instantly to a friend while you IM (2 GB limit).

Productivity
Contact Search Bar: Quickly find a contact to IM, call, SMS or more.
Yahoo! Address Book: View and edit your Yahoo! Address Book information for your contacts right from Messenger.
Stealth/Privacy Settings: Make yourself appear online to some friends, and offline to others.
Yahoo! Mail alerts: Get notified when new a new Yahoo! Mail message arrives.
Voicemail: When friends call you on Yahoo! Messenger, they can leave you a voicemail if you're unavailable.
Tabbed IM Windows: Reduce desktop clutter by organizing multiple conversations into a single window.
Buzz Alert: Get your friend's attention with a click of the Buzz button.

Fun & Personalization
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.
Skins: Choose a different skin to give your IM world a new look.
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.