One of the most popular MSN clients for Linux recently got it's first update in over a year. aMSN 0.95 is
out, including a host of new features that make it more compatible with the Windows client. It adds things including direct file transferring, multiple account support, webcam support, conferencing and tabbed windowing, a definite advantage that GAIM had as a client. It is a bit more robust than the standard messenger client, but aMSN is, of course, MSN-specific and not a multiple-protocol client like GAIM or Trillian. If you use it, definitely get the latest version. If you use MSN in Linux, give it a try.