Best tools for remote real-time development collaboration?

I'm trying to collaborate with a friend across the country and I'm frustrated by the available tools.

What we normally want to do is have an audio connection open, work on our own individual Eclipse instances, and have a small window showing the other person's screen.

We do the audio over Skype, but we can't figure out how to share a miniature version of each other's screen. What we do now is point the webcam at the screen -- it's horrible but a driver that allowed you to share your screen contents exposed as a webcam interface would allow us to use Skype's built-in sharing features.

A lot of people here must do this. What tools do you use?