Good point. And the obvious answer – port iChat to Windows, as they did with iTunes – might not be the smartest. So how about this, on the back of the iPod WiFi announcement that’s so got to happen in 2006:

iChat on your iPod

Think about it – whenever your iPod is on a WiFi network, you can have iChat on screen, scroll through your buddies with your scroll wheel, or your contacts to dial a regular phone. There’s your iPhone.