
Just in time for summer picnics, you can get plastic silverware that's biodegradable, from Earthware Biodegradables.
An event in Golden Gate Park (A La Carte A La Park, I believe) used them... you'd never know that they were anything besides standard plastic. The hardest part was getting the attendees to do the source separation of the compostables, the recyclables, and the landfill-only materials.