I like the wiki, certainly a good mix of thoughts already! 
To add some more, here’s some stuff we have been working on in the Edgeryders organization in the past months: our Green Travel Manual and Distributed Collaboration Manual will add some relevant points to wiki section “Organizational travel policies”.
It’s obvious that when we (rightfully) say “climate crisis”, the adequate reaction is crisis response, not business as usual. For example, and this is still one of the more moderate versions of the required changes, all offices must be closed down as fast as possible. In the digital age, people who just move information around have no justification to travel at all. Even if their traveling would be completely CO2 neutral, office buildings require heating, ventilation and embodied energy in addition to homes, all of which is CO2 intensive for the foreseeable future.