Still no case. I've been told that Atomic's "looking into it" for what that's worth.
I use a Blue Reef neoprene generic computer cover. It's almost twice as long as it needs to be but is a reasonable fit otherwise and provides plenty of padding. Blue Reef, if you don't know, is Leisure Pro's housebrand. The price, I think it was $8, was certainly right but it's like parking a Ferrari inside a Greyhound Bus Station.
I'll gladly toss them in the trash if Atomic ever produces a case or even just a custom cover.
You might want to consider using a Zagg screen protector, too. The supplied Atomic screen protector isn't bad, but nothing beats a Zagg and you can get one specifically for the Cobalt.