My friend and I tried the orange and yellow singles last Monday when we found them at Target (was in Costa Mesa) while I was visiting. He said the yellow one was good and the pineapple flavor wasn't too overpowering. I liked the orange one as well, it reminded me of fruit punch version of Gamer Fuel. We also picked up a case of regular Baja Blast.
Yesterday, I saw a case of Baja Blast Zero at Target (here at home) but didn't pick it up. I have been picking up the regular Baja Blast singles whenever I've stopped by though - don't think I've seen any Zero singles outside of either regular MTN DEW or Major Melon.