The new Wiseduino board offers several improvements (I would like to think) over the old one:
- prototyping area, with pads for an 8-pin SOIC chip; this part can be sawed off along the fine holes, to match the dimensions of a small shield (and of the previous version); the intention was for this piece to be broken off by hand, but the PCB is too thick to make this possible;
- two mounting holes for screws/standoffs;
- power (5V) provided through the FTDI connector as well;
- through-hole power switch.
The prototyping area can be used to add buttons, buzzer, LEDs, or even a voltage regulator.