We started with a flyer that was adapted for print (as a direct mail postcard), as well as digital versions for facebook, twitter, eventbrite.
photo from Twin Cities R!SE facebook account
photo from Twin Cities R!SE facebook account
One other components was a series of 24 x 36 print posters. Full disclosure, I love large scale printed items - so that was fun. We also did a program, a placard, a folding table card (not pictures), signage, and slides for their large screen display.