Yahoo Messenger v8 stable features:
1. Instant message with one friend, or conference in a bunch
2. Send text messages (SMS) to friends’ mobile phones for free*
3. Join a chat room to meet new friends while you discuss your favorite topics
4. Make free PC-to-PC calls and PC-to-phone calls for as low as 1¢ a minute (plus free voicemail!)
5. Show your style with emoticons, Avatars, audibles and IMVironments
6. Share securely with automatic file scanning for users of Norton AntiVirus or Internet Security 2007/2008

Download Yahoo messenger 8 stable version :

————————————————

Yahoo messenger v9 BETA features:
# Instant message with one friend, or conference in a bunch
# Send text messages (SMS) to friends’ mobile phones for free*
# Join a chat room to meet new friends while you discuss your favorite topics
# Make free PC-to-PC calls and PC-to-phone calls for as low as 1¢ a minute (plus free voicemail!)
# Use the built-in media player to watch web videos and view photos with friends
# Show your style with emoticons, Avatars, audibles and IMVironments
# Share securely with automatic file scanning for users of Norton AntiVirus or Internet Security 2007/2008
#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.#
#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.
#Call Forwarding: Have incoming calls to Messenger forwarded to another phone number, even if you’re signed out (Phone Out account required).
#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.
#Message Archiving: Maintain a private archive of your IM conversations.
#Buzz Alert: Get your friend’s attention with a click of the Buzz button.
#Yahoo! Updates: Get real-time updates in Yahoo! Messenger about what your friends are posting online, reviewing and generally buzzing about [..] and more others.

Download Yahoo Messenger v9 BETA :

download buttons source free softwares