NW Digital Radio http://nwdigitalradio.com/ is using groups.io for support. If you want to get a feel for groups.io, create a personal account at Groups.io https://groups.io/register then join the main NW Digital group by sending an email from your registered email account to main+subscribe@nw-digital-radio.groups.io (you can unsubscribe at any time)
Look at the sub-groups - compass has github integration, udrc is the busiest.
One thing that I find useful, is once you create an account, you can list all of your email accounts as 'senders', so you don't have to remember which email account you set up as your account, you can post from any of your listed email accounts.
If you have a google or facebook account, you can use that as your primary email and use their sign-on for logging in.
------------------------------ John D. Hays K7VE http://k7ve.org/blog http://twitter.com/#!/john_hays http://www.facebook.com/john.d.hays