I was so impressed with Marco's Parola for Arduino project that I have, with Crossroads invaluable help, designed a PCB that uses the larger 60 mm square LED matrices. Here is the thread
where this is developed and once I have done some minor tidying up of the Eagle package Marco has kindly allowed me to put the files up on his Parola site for download. The final version of the Eagle files in reply # 28 of that thread are functional aside from the fact that the drill hole size for the sixteen LED matrix holes are marginally too small. This, along with some other minor cleaning up will be done before they are put up on the Parola site.