With Pidgin, you can Buzz your Yahoo buddies by pressing Ctrol+G or click Buzz button now.
Old versions:
http://www.anhtt.net/blog/2008/04/01/pidgin-plugins-buzz-with-pidgin-on-ubuntudebian-linux/piwener.html
http://www.anhtt.net/blog/2008/04/14/pidgin-plugins-for-windows-hahahha/piwener.html
Where can I download the new version of Yahoo Buzz? I am using Pidgin for windows. Ive tried the old version (beta3) and it does not send / receive a buzz sound with Yahoo Messenger version 9.x. I also dont see the cool Buzz button as illustrated but pressing Ctrl-G does send a Buzz message.