I have a set of wheels with carbon spokes, no problems. Almost ALL of my wheels are built with Sapim CX-Ray spokes, which are light, high tensile aero spokes making it very easy to get a lot of spoke tension. I even have a wheel with only two spokes, both carbon. I might only be 230 lbs but I run high pressure road clinchers and often ride at night and hit potholes at high speed. You just need the right components laced up right, properly tensioned AND stress relieved.
Chaadster is 100% correct.
Good wheel builders are not so common anymore. You might have to go online, depending on where you live.