I've switched to Yate's QT client (http://yate.null.ro) for all my communication needs. allocate about 512MB of RAM to a VM for Asterisk/Openfire/FreePBX, and connect to it. You'll have voice/video plus instant messaging, with no central authority snooping on all your conversations.

I realize I could probably use Yate for everything, but I know asterisk and openfire better at this point, so I use them. :)