Really proud of the founders of this group, a couple of guys from little old Adelaide!
Best thing we can do to help is sign up to the mailing list, so that when they are approaching regulators and looking for real world stories of issues we face as developers/consumers due to anti-competitive behaviour, people on the mailing list can provide those stories.
What is anti-competitive behaviour? Think Apple locking out all other browsers from their iOS platform, forcing all user's to use Safari (if you didn't know, "Chrome" and "Firefox" on iOS is simply a skinned Safari)