The medical expense fundraising site he set up [1] mentions that she "passed away on March 29, 2013 after living with cancer for more than a year."

[1] http://www.youcaring.com/medical-fundraiser/in-memory-of-lau...

It was not Brian that posted it here but you can talk to him on twitter @bb. I shared this link here because it's not possible to comment on his blog.