Besides D&D & Pathfinder, Dungeon World seems to have gained some traction as a rules set for Dark Sun. You can find Travis Stout's excellent writeup of Dark Sun Classes for Dungeon World, there's also some equipment and useful tags such as Fragile for weapons.
Here's a conversion of the A Little Knowledge intro adventure included in the original 2e Dark Sun boxed set, converted to 3e.
A Little Knowledge 3e Adventure Webarchive Link (offsite)
Listen to episode 94 of Going Last at about the 52 minute mark for details.
As mentioned in the podcast you can also watch Teos talk to Mike Shea of Sly Floursh in their Looking Back on Dark Sun Organized Play Campaign video on Mike's youtube page.
EDIT: More information can be found on the BaldmanGames website in the Ashes of Athas Forum
Rare and mythical even in the Green Age, the Athasian Unicorn survives today only in the foothills and Scrublands South of Kurn.
Sheena and Kazaruth walked towards each other on the barren land of the Salt Flats. Each could see the other, but neither's face showed any recognition of the other. Both of them had been instructed by their Elemental Lords to travel through the Salt Flats. Neither of the inexperienced priests knew why, but did as they were instructed.
Elemental spells for your 2nd edition AD&D Dark Sun game.
Part 23 of Lady of Shadows is up.
This was not going as I had planned.
As you did not arrive with an army, might I assume you are not here to arrest my nephew? Lord Talibs voice was so soft as to be almost a whisper. His pale eyes seemed to look past me, and I wondered if perhaps he were blind.
After talking with some of the other staff at athas.org, I’ve decided to close the arena.
The code for the arena is based on a dead forum project; even when it was alive, the hacks that I made to enable single signon made things very difficult to keep up to date. Because of this, it’s become a drain on server resources, and has actually made it more difficult to keep other aspects of the site up to date.
Considering that the traffic on the arena numbers in the single digit posts-per-month range, I think it’s best put into mothballs.
While I’m going to be removing the site soon, I will be saving the database; if there’s a demand for it, I’ll see about setting up a read-only archive of the site.
Once the arena is removed, I’ll be undertaking some infrastructure modernization efforts – Some visible, some behind the scenes. I’ll talk more about that later.
This month’s Dragon magazine is live today:
Let the tarrasque run roughshod over your campaign. Save the town of Hochoch in the Grand Duchy of Geoff. Deck the halls with wondrous tapestries. Build fantastic inns and taverns from scratch. PLUS: The return of the decapus, the magen, the rhagodessa, and the thoul. We proudly present for your gaming pleasure, Dragon 418.
Rodney Thompson’s Eye on Dark Sun is titled The Widow’s Spirit, and features plot hooks relating to the bitter spirit of an executed templar-wife of Nibenay.
As usual, all Dragon content requires a DDI subscription.
For anybody who happens to be on Google Plus, I’ve set up a Dark Sun community. Join up and introduce yourself; I’m interested to see what direction these go…
Over at Obsidian Portal, December’s Campaign of the Month on Obsidian Portal is a Dark Sun campaign. The campaign is La Decade des Heros! by Athas.org member Pils. Congratulations Pils!