The guys over at
http://nesathon.blogspot.ca/ are playing 100 hours of NES to raise money for MS research. Go check it out and help out if you can.
As opposed to
MS Research raising money for
MS Research?
[/bad-pun]
But seriously, I wonder what'll be included in the "Homebrew sampler".
Honestly, the only meaning of the MS acronym that I know is Microsoft, and the marathon page does not explain the acronym at all.
At the right side of the NESathon page: "Multiple Sclerosis Society of Canada". (My second link also mentions multiple sclerosis.)