Daffodils are sold by volunteers to raise funds to find a cure for cancer.
I first heard about them when I joined this guild and saw Zathura's reply in JoyRose's
favourite flower thread and then a couple months later noticed posters about them in my school. Turns out they are the second biggest fundraiser here (first is cystic fibrosis).
VO dedicated the April Fool's storyline to his father who is dieing from a terminal cancer of the brain. Cancer has affected so many people who know someone with it that many Gaians have equipped daffodils on their avatars to show support.
Unsure of anything else to add / say here but I'll try to keep mine equipped for a long time to be a symbol of hope.
Here's a link to the story of Daffodil Days in Canada:
http://www.cancer.ca/ccs/internet/standard/0,3182,3649_373946__langId-en,00.html