Hmm, that question #1 looks familar... funny how it pops up again and again because the marketing of the feature is totally misleading...

You can't video chat/internet call to people in Google Talk unless they are also using an N810/N800. You'd need to install Gizmo and have the other person on their PC desktop use Gizmo to video chat the way you're thinking.

You could internet call using SIP in OS2008 (I believe that is out of the box, yes), but that isn't compatible with Google's voice chat, it's more of a protocol for office VOIP.