Hey gang! I'm glad to see Athas.org still going after so so many years. I've been a longtime fan of Dark Sun - since the 2nd Edition revised box, which I first picked up as a kid - and I've always leaned on Athas.org in the long stretches of time when "official" material has been waiting in the wings. Thanks for working so hard to preserve the fandom. One thing that's true of all of Dark Sun fans I've come across - they're diehard in their devotion!
I've been running a Dark Sun game for about the past year or so, using the 5th Edition rules, starting with the debut of the Player's Handbook and evolving as well as we've been able as the newer rules come out. I've adapted a lot of the material from past Dark Sun sources (2E and 4E alike) as well as pulling a lot of inspiration from some of the Pathfinder adventure paths, but the antics of the players - some of whom take the setting more seriously than others - have turned our story into something new altogether.
We actually stream the game online, on Twitch, where we've gathered a small following. We play Tuesday nights at 7:30 PM Central, at my channel, www.twitch.tv/foxhound__ We unfortunately didn't start streaming at the very beginning of the campaign itself, but we have stuff going back as far as last January archived on YouTube, too.
You can also dig into the mostly-up-to-date plot synopsis here: http://wearefoxhound.com/dnd/story/ The very shortest version is that the party, after banding together to defend Altarauk from defiler attack, wound up traveling to Tyr and getting involved in a struggle against an elemental cult that seeks to awaken an ancient evil (Ul Athra, from the 4E material), which has taken them on a journey far beyond the Forest Ridge to meet with the ancient Order, to the ruins of Yaramuke, and now (as of last session) to the chaotic streets of Raam, where their latest party member, a naive dray, has already run afoul of the local template.
I love Dark Sun and it's one of my greatest joys to be able to still muck around in this great universe. Thanks to everyone at Athas.org that helps keep this niche alive! I hope you can tune in and share in some of the fun.