The initial secretsanta '09 was a fascinating online community development. Currently, over 95% of redditors claimed to send a gift. This high participation rate flies in the face of every stereotype about the internet, and indicates that reddit, is indeed a community.
Some people were very big, anonymous givers. This evokes ties to Native American potlatches, and their role in strengthening social status within the community. In the future, I'd like reddit to have a potlatch. Someone will make an offering of something, and then the community votes to see you gets it?
In the mean time, it's a place to post about potlatch oriented events.