Hi! The New Netherland Settlers project has a Google Group - see https://groups.google.com/forum/#!forum/wikitree-new-netherland-settlers
If you're a member of the project, but not the Google Group, send a request to join from the link above (you have to be signed in to Google to have that option) or send me a private message & I can send you an invitation. If you want to use a different e-mail than the one you use for WikiTree, just tell me the e-mail you want the invitation sent to.
I've sent invitations to about a third of the project's members, and will continue to send invites when I find a project member's e-mail (needed to send an invitation to the Google Group).
If you're interested in joining the project, please contact the project leader.