multi-platform that also provides encryption options? I've used Adium/Fire on MacintoshTrillian on WindowsIs there any software that runs on Mac, Windows AND Linux that can provide encrypted Yahoo/AIM chat?Skype is its own network, and not AIM/Yahoo.
The easiest way to have an encrypted conversation between any platform is probably to use a jabber server that supports SSL. jabber.org supports SSL, and clients are freely available for every platform. Adium for Mac is a good client, Gaim for Linux, and Gaim or Trillian for Windows should cover most of your needs using that combination.