Norbert Tretkowski has released a port of Gaim 0.70 for Debian GNU/Linux 3.0
Gaim is a multi-protocol instant messaging client for Linux, BSD, MacOS X, and Windows. It is compatible with AIM (Oscar and TOC protocols), ICQ, MSN Messenger, Yahoo, IRC, Jabber, Gadu-Gadu, and Zephyr networks.Download
Changes in 0.70:
Our friends over at Cerulean Studios managed to break my speed record at cracking Yahoo authentication schemes with an impressive feat of hackery. They sent it over and here it is in Gaim 0.70. However, certain details of the authentication scheme depend on the challenge string the server sends us, and there's really no way to tell what it does until Yahoo starts sending new challenge strings. So you can expect a few more breakages to come soon. I wouldn't sign offline if I were you.