Isn't this what Google Groups is used for? (what's different / lacking there? I'm of the age where I remember SourceForge as somewhere I would sometimes download things from as a young teenager but nothing more than that)
At this point, unlike Reader, there's real cash behind the functionality. It's possible they could just fold it into Gmail, I guess, but with other mail interfaces like Inbox popping up in the Google ecosystem it seems if anything they're trying not to shoehorn too much more into a flagship product.
My guess is Groups will stick around for a while yet.
So it’s possible.