Google Talk

Customize Talk
Offers news, tips and tricks about the software.
http://www.customizetalk.com/

Google Groups: Google Talk Help Discuss
Provides a discussions group to share questions about the software.
http://groups.google.com/group/Google-Talk-Help-Discuss

Google Talk
Official page of the software. Provides tutorial for beginners and link to download.
http://www.google.com/talk/

Google Talk for Developers
Provides three open source API to allow developers to use the protocol in theirs applications.
http://code.google.com/apis/talk/talk_developers_home.html

Google Talkabout
The official weblog about instant messaging, voice, and other communications with the software.
http://googletalk.blogspot.com/

Wikipedia: Google Talk
Provides a description of the components of the application and its future releases.
http://en.wikipedia.org/wiki/Google_Talk