Ok, since LadyAda and company encourage hacking, I took my new Arduino Esplora and documented the pins on the expansion header.
I also developed test programs for both hardware serial and software serial over the pins on the header. This could allow someone to add a TTL serial radio instead of the planned display.
For information and code via github, see http://21stdigitalhome.blogspot.com/201 ... nouts.html
Happy Hacking, Mike