Voice Chat apps

I had my laptop rebuilt with Vista RTM version and had to install the instant messengers to get connected to my family across the globe. My brother is waiting for me to come online with either Windows Live Messenger or Google Talk. I started with Live Messenger, it's a huge download, 17.9 MB, took about 8 minutes to get it installed, but for some reason I was not able to sign-in (Beta apps!). Gave up and started with Google Talk, it's only 1.5 MB and in about 2 minutes I was voice chatting with my brother. I'd say that's usability. I don't know what is the business (monetization) model for Google Talk, but it is light and it does what it's supposed to do. Even though Google Talk is a new comer to the instant messaging world, it is a clear winner in terms of usability and it is very well integrated with GMail. I understand Live Messenger got lot of other features, but do I need it? Perhaps, we need a Windows Live Messenger Lite?

later...