I bought this little board a while ago through eBay but I could never get it to work.
I finally got serious and popped the display off the carrier to trace the circuits. I'm not sure if, in the end I did things much differently but I understood the pinouts and was able to use the PCD8544 software from the playground successfully. I'm just posting it here so people can see what a nice little display this is and maybe it will help someone else get going.
The connector pins at the top and bottom on this board are:
3 /CS active low chip select - I just have it grounded
4 /RES active low reset - i just have it tied to plus V
5 D/C data/command control line
6 SI serial data input (like MOSI)
7 SCK serial data clock
8 dims the backlights if pulled low
Here's a few more pics of the carrier board. The distinguishing point to me is that the LCD itself has a 9 pin connector rather than the alternative 8 pins. This site pcd8544 based displays (serdisplib) has an excellent description of the two LCD types.
The code from Arduino Playground - HomePage here worked great once I had figured out the pins.