$1 (Canadian) for every story that pairs Snape with someone who used to work at Hogwarts when he was a student (former professors, Dumbledore, Hagrid, Filch, etc.)
$1 (US) for every fic or art (including gen) that features Snape in a close relationship with Harry, e.g. - Snarry, Snape is Harry's father, Snape mentors Harry
$2 (US) for each story if the relationship evolves to where they are both at least content
$5 (US) for every fest entry where Snape end up in a romantic and happy relationship with Harry
Partners in Health (one of the first in quake-ravaged Haiti, and still helping there and in other disaster-stricken or war-torn areas)
Tearfund. This UK-based group has been working in Pakistan, even before the devastating floods, and they get around the reported Taliban abuse/corruption by distributing funds directly to their members on site, in order to help the people who need it most.
Soles 4 Souls. When you walk everywhere, caring for your feet is important. Soles4Souls provide shoes for the impoverished in underdeveloped nations, and also for victims of disaster all over the world. One dollar guarantees one pair of shoes donated to someone in desperate need.
So the holidays might not just net us plenty of Snape, but also help out some folks that need it. :)
We say the more the merrier, so if you haven't already, consider signing up for and pointing your artist/writing friends to snapelyholidays 2010 exchange!