There are several active GD discussion forums online, and while I lurk at a couple, I'm really only active on just one. A regular lurk spot is the GD forum at archive.org, which has been going for nearly ten years now (!?) and it's only the weirdly linear formatting that prevents me from actively participating. But it's still an incredible wealth of information, even if that information tends to get buried almost immediately. I was just revisiting this wonderful post on noteworthy Playing in the Bands from 1976-1995 by bkidwell (who has posted some really fantastic analyses there), which covers a lot of non-obvious selections. This is most definitely worth a look if you've never come across it.
Some serious #TIANILB happening in there, btw. As with any great GD analysis, this is equal parts "how could he have left out xyz!?" (really, no 4/19/86?) and "seriously? I've never heard a thing about abc before..." before pointing the way to fertile ground for even more analytical plowing to be done (do you think there will ever be a quasi-comprehensive review of the post-GD oeuvre?).