I belong to a yahoo group called An Affair with Art. The mingle for October is Altered Cabinet Cards. http://images.google.com/images?sourceid=navclient&ie=UTF-8&rls=DELA,DELA:2006-03,DELA:en&q=cabinet%20cards&um=1&sa=N&tab=wi
All you have to do is take the cabinet card print them or buy them and start altering. A ton of fun.
Now for the some really cool altered cards go here