I obtained a copy of the of final ballots for the Cambridge, Massachusetts City Council and School Committee elections and used OpenSTV to verify the official count.

You can download a PDF reports of the City Council election and School Committee election created using OpenSTV, and compare them to the official results at the website for the Cambridge Election commission.

I've also reformatted the official Cambridge ballots (CC2009.blt and SC2009.blt) into the BLT format used by OpenSTV so that you can verify the election results yourself using OpenSTV.