You should be okay. I flew to CA last weekend with a laptop, security cable, 20ft of cross-over, noise canceling headphones, a phone cord, and a digital camera. I was worried the steel security cable would get me in trouble, nothing of the sort happened.
I've also got to add, the security personal were INCREDIBLY nice. I was ready for run-of-the-mill government employees. These TSA folks, in both California and Atlanta, were *very* nice.
Hell, the guy in San Jose even said "Nope, nothing here but a lot of smiles!" and he was *genuine.*
-Jeff