Best free IM clients
Multiple flaws in Yahoo Messenger
Two separate serious flaws were disclosed in late August. Check your version number and if less than 8.1.0.419 then update now from here:
http://messenger.yahoo.com/download.php
How to send an SMS text message via Google
For U.S. phone numbers only.
http://toolbar.google.com/send/sms/index.php
Google introduces chat from within Gmail
Google is progressively rolling out to USA-English users, a beta version of a new GMail chat feature that allows you to talk with anyone connected to the Google Chat network or compatible network. The integration works very well; To contact someone, just hover the cursor over an email or contact and a window pops up asking whether you want to chat or email the person. If you select chat, an invitation is sent to the recipient. If they accept, a green ball appears next to their name and a special chat window pops up. You don't even need the Google Chat client installed to use the service though it is required for voice contact. Chats can also be saved and searched from within GMail, just like email. Quite impressive really. To use Google Chat you'll need IE6 or Firefox 1+. If you use the later you may have to disenable the AdBlock extension as it interferes with the Google service.
http://mail.google.com/support/bin/topic.py?topic=8405