The problem I am trying to solve is working with a person that I rarely see in person who is a visual person.

I would like for both of us to connect to a Sketchup design and both be able to view it at the same time. The document could be hosted on GoogleDocs or GoogleWave.

Editing can either be done via passing an "edit token" back and forth or both editing at the same time. There would also need to be some camera commands like: clone view and follow view.

Replay could work in some cases, but would involve me trying to anticipate his questions, which often I am not able to do.