https://lekkimworld.com/2009/02/04/lotusphere-2009-badge-stickers/
Lotusphere 2009: Badge stickers – lekkimworld.com
lotuspherebadgestickers
https://zhangling.org/20090309/lotusphere-cdl.html
Lotusphere comes to CDL · Ling Zhang's Blog
Ling Zhang's Blog — tech, work, and life notes (since 2004, migrated from WordPress)
comes toling zhanglotuspherecdlblog