I agree with your frustration and you certainly have the "right" to complain if you want. I think maybe just realize that we all want it just as bad as you do. I've been using a 7 year old nokia for the last week
This is not a slam, so don't read it that way btw.
I will say this for extensive experience of doing free work that I should never have done photographically. When you are doing something for free, you never tell the "client" when it's going to be done. Why? Because it's free and other stuff comes up and you don't want to look like a tool for being LATE on something you are doing for FREE. It just adds another layer of expectation that should never be there if you are doing something out of the kindness of your heart.
Believe me, I want a date too - maybe just as bad as you. I want to know what to expect, but these guys aren't getting paid and presumably have other lives that they have to maintain - they are preserving themselves and I can't, even remotely, complain about that.
Free work sucks - I don't do ANYTHING for free anymore in my professional carrer because it always ends badly. I very much sympathize with these guys, but on that same coin very anxiously await NEWS and a RELEASE.
Again, I'm not slamming you here nor am I opening arguing/disagreeing/'calling you out' on this - I think everyone understands your frustration