Probably a silly question, did you select the correct board (Arduino Pro or Pro Mini (3.3V, 8MHz) w/ ATmega 328)?

I didn't the first time and got a bunch of errors.

Starting at just left of the top, and going clockwise:
+3.54V
GND
A0 - analog input
A1 - analog input
A4 - analog input
A5 - analog input
GND
+3.54V
0 doesn't do anything
1 is +3.54V
2 is digital I/O as pin 2, I've only tried O
3 - digital I/O as pin 3 with PWM output (you can analogWrite to it a value 0-255)

I figured out that pin 3 is pwm only because it's used that way in the motor shield demo on this site.

I'm guessing the board is not working correctly, it seems like 0 and 1 should be digital I/O as well.

I tried some simple variants of the blink sketch to try and understand the board schematics (this is my first Arduinoish device).

I agree that tab zero does nothing - it seems to be continuously powered.

The tab marked 1, 2, and 3 are referred to by the same numbers, so to make an LED blink when connected to tab 1, replace the "int led = 13;" with "int led = 1;".

I hope this is helpful for others.  Now I need to learn how to do the same thing with the analogue pins.

Does anyone know what the 6 pads in the middle connect to?

I believe they are the other way of accessing the processing chip directly, without the USB board.