The annual Second Life Relay for Life raises cash for the American Cancer Society every year as a virtual environment analog of the physical world event. It's definitely one of the high points of the Second Life calendar. Though lesser fundraising events are held through the year to raise money for this worthy cause, this weekend is the big one.
Second Life's Relay for Life has raised over a third of a million US dollars since its inception, and raises more each year. Look past the sensationalistic guff in the media, and one of the most remarked on characteristics of Second Life users is their charity and generosity towards those in genuine need.