The Zing Auction is a site put together by the Agaric Design Collective for the Amazing Things Arts Center, which has the worthy goal of building community through the arts.
It runs annually in the fall. Visit it here: http://zingspace.org/auction/
(In its first year, 2005, the fundraising auction was hosted on pwgd.org, so if you are following an old link to index or auction_thumbnail please go on to the new site!)