Throughout the year, Aaron Semer and Jason Ross (STG staff) collect posters and secure artists' signatures specifically for the DOORS auction. Aaron posted them to the DOORS site today: http://www.stgpresents.org/doors You can start bidding on them now!
Check the Posters link (under 'Shop Items') on the DOORS site and bid away. From a poster signed by the Merce Cunningham Dance Company to a signed Rodrigo y Gabriela poster, there's hopefully something for everyone in the DOORS poster auction.