I do have skype which I've used for audio and video convos before with another friend, but will always use iChat if the recipient also has a Mac.
On routers, I'm using an Apple Airport Extreme base station, my sister doesn't have a router (direct connect), and my mother is using a 2wire router.
I'll be going down to visit my parents this weekend, so I'll have more to report when I get back sunday night.