'bit late on the uptake this time, but there's a new ACKS kickstarter, for the Heroic Fantasy Handbook and Barbarian Conqueror King. The Heroic Fantasy book has been in the works for a long time; I acquired a draft copy a year or two back (thanks Alex!) and we used some of the rules from it (mostly Warrior Code) in the Midnight ACKS campaign. I'm looking forward to seeing it in its finished form. I've been reading the Poetic Edda and kicking around a low-magic, Iron-Heroes-esque "mythic Scandinavia at the turn of Christianity" setting, and this should support that well (provisional name: "ACKS-Age, Sword-Age").
I'm a little less excited about Barbarian Conqueror King. Nothing against Omer, I'm just not huge on pulp. That said, there was a preview of some Expedition to the Barrier Peaks-style rules for figuring out how to use and repair advanced technology, and it reminded me of D20 Apocalypse... and that got me thinking further that ACKS and Darwin's World were sort of made for each other. Then again, maybe Crawford's already done it better with Other Dust.