Miranda IM

• Username: Your Google Talk username (without any @ symbol or domain information)
• Password: Your password
• Login Server: gmail.com
• Use SSL: Yes
• Manually specify connection host: Yes
• Host: talk.google.com
• Port: 5223
• Keep connection alive: Yes

viz. http://www.google.com/support/talk/bin/answer.py?answer=24885&query=gmail&topic=0&type=f