Previous Scotland Project Signup was closed with a note 'Reorganization in Progress'
I am sure when they get this re-organized they will post a new g2g for the project.
You could review the Tartan Trail page, but I am pretty sure that is one of the things they are planning on reorganizing. That will give you a sampling of what they new members of the project do as a starting point.
You can be one of the first to join the new G2G to join Scotland Project that has just been posted.