Another friend has his desk facing the wall and his chair and yours have you sitting knee to knee. These two offices make power and status statements. Think about how to make a virtual setting that creates the atmosphere you want to project. The uniqueness of the internet is the potential for EASI, rapid interactions between people. Make the most of it.
Many teachers report having more interactions with students over the internet than in the classroom.
Granted, putting a non-interactive teacher on a computer won't make him interactive, but you need to exploit the strengths of the technology. Interaction is easy but not immediate. If students misunderstand something, you and they may take time till you realize it. The more you think through the possible ways a statement can be interpreted and try to make it very clear, the more you can avoid needless confusion and frustration. Modularize Break your material into small units with good opportunities for interaction after each.