MiniSSC on wifire16
The MiniSSC protocol used by some servo and relay controllers is very simple:
0xFF [channel] [value]
value can be from 0 to 255, with 127 being the midpoint. Relays are even easier: 0 is off, 1 is on.
As a result, the Arduino sketch for a wifire16 board that processes this data and activates the SSR channels is also very simple, and allows the wifire16 board to be used with any control software that supports the protocol. One example of this is VSA by Brookshire Software. (I've never worked with VSA myself, but it's what a friend uses to control and sequence his Propane Dancefloor project.)
The wifire16 MiniSSC code can be found here.