...sign up for the Steam beta for the Steam Community. It's really great. You just hit shift+tab in-game (any steam game actually) and you can chat or voice chat with other people in your friends list. If you use XFire, there really is no reason to continue to do so. Steam Community is basically XFire integrated within steam. We should start using this instead of XFire, as it is easier for new people to use since it's built-in and not a third party program to get.
You can sign up for it in STEAM under "betas"
You can sign up for it in STEAM under "betas"