There are other collaboration providers and apps out there. There are web-based ones, and of course even Google offers sharing. My "Audit" is a Google Sheets document which is publicly shared. These things are out there. I would really research ways to do Internet collaboration and see what comes up.
If we could simplify and use something prebuilt... Google apps and gotomeeting.com, I think we will find that we can meet up and share stuff.
My advice to you is this:
You will need to double your efforts on collaboration... Meaning that you will likely need to attend and lead all meetings, while most folks will be missing every other one due to scheduling. So plan on repeating yourself a lot.
Also, test the collaboration system.
If you pick something, do a trial with a small 3 to 5 group of people. Then and only then announce it for everyone.
I am speaking from experience. I used to lead a subgroup for weekly meetings. I had 5 to 10 subordinates. I, in turn, was one of 10 or 20 leaders who would meet online to hear from the CEO and the top echelon.