I have a port of rosserial running on the Pioneer Kit. More details at http://wiki.jigren.org/index.php?title=Rosserial_On_Cypress_PSoC4 .
I've just gotten three simple examples (HelloWorld, pub-sub, and ADC reading) ported from the Arduino suite so far, no exciting apps to show yet.
I'd love to hear that some other people get this to build and do something cool!
Chuck