Scott makes a MTB
wheel with carbon spokes. Though, as others have mentioned, unlike the Hunt wheels, the spokes are molded to the rims and hub shell. Still, Scott are putting these wheels under their World Cup XC racers, meaning they must think the carbon spokes will hold up to much harder riding than an average road wheel will ever encounter.
On the topic of wacky spoke ideas from the world of MTB, they are now building wheels with spokes made out of Dyneema
thread. Somewhat surprised not to have seen this appear on road wheels yet, but assume that has to do with aero issues. Though it looks like they are pitching to the gravel crowd.