There's also AMSN, looks a lot like MSN.
Not sure about video and audio, but not sure if GAIM can do that either.
I'm using centericq (www.centericq.de
), which has no audio or video, text only,
no smilies, no pictures. But it fits in an xterm, uses little resources, does every
protocol (ICQ, MSN, yahoo..) I can think of and more.